研究業績

本論文

Observation of Poiseuille flow of phonons in black phosphorus Y. Machida, A. Subedi, K. Akiba, A. Miyake, M. Tokunaga, Y. Akahama, K. Izawa, K. Behnia, Sci. Adv. 4, eaat3374 (2018). DOI:10.1126/sciadv.aat3374
Anisotropic B–T Phase Diagram of Non-Kramers System PrRh₂Zn₂₀ T. Yoshida, Y. Machida, K. Izawa, Y. Shimada, N. Nagasawa, T. Onimaru, T. Takabatake, A. Gourgout, A. Pourret, G. Knebel, and J.-P. Brison, J. Phys. Soc. Jpn. 86, 044711 1-10(2017). DOI:10.7566/JPSJ.86.044711
Quadrupole-driven non-Fermi-liquid and magnetic-field-induced heavy fermion states in a non-Kramers doublet system T. Onimaru, K. Izawa, K. T. Matsumoto, T. Yoshida, Y. Machida, T. Ikeura, K. Wakiya, K. Umeo, S. Kittaka, K. Araki, T. Sakakibara, and T. Takabatake, Phys. Rev. B 94, 075134 1-8(2016). DOI:10.1103/PhysRevB.94.075134
Locating Horizontal Line of Zero on the Fermi Surface K. Izawa, JPSJ News and Comments 13,02(2016). DOI:10.7566/JPSJNC.13.02
Colossal Seebeck Coefficient of Hopping Electrons in (TMTSF)₂PF₆ Y. Machida, X. Lin, W. Kang, K. Izawa, and K. Behnia, Phys. Rev. Lett. 116, 087003 1-5(2016). DOI:10.1103/PhysRevLett.116.087003
Thermal Conductivity through the Quantum Critical Point in YbRh₂Si₂ at Very Low Temperature M. Taupin, G. Knebel, T. D. Matsuda, G. Lapertot, Y. Machida, K. Izawa, J.-P. Brison, and J. Flouquet, Phys. Rev. Lett. 115, 046402 (2015). DOI:10.1103/PhysRevLett.115.046402
Intact Quasiparticles at an Unconventional Quantum Critical Point M. L. Sutherland, E. C. T. O’Farrell, W. H. Toews, J. Dunn, K. Kuga, S. Nakatsuji, Y. Machida, K. Izawa, and R. W. Hill, Phys. Rev. B 92, 041114(R) (2015). DOI:10.1103/PhysRevB.92.041114
Fermi surface, magnetic, and superconducting properties in actinide compounds Y. Onuki, R. Settai, Y. Haga, Y. Machida, K. Izawa, F. Honda, D. Aoki, C. R. Physique 15, 616-629 (2014). DOI:10.1016/j.crhy.2014.06.005
Pairing Symmetry of UPt₃ Probed by Thermal Transport Tensors K. Izawa, Y. Machida, A. Itoh, Y. So, K. Ota, Y. Haga, E. Yamamoto, N. Kimura, Y. Onuki, Y. Tsutsumi, and K. Machida, J. Phys. Soc. Jpn. 83, 061013 (2014). DOI:10.7566/JPSJ.83.061013
Understanding of the Temperature-Pressure Phase Diagram of β- Pyrochlore Oxides: A Role of Anhamonicity on Superconductivity T. Isono, D. Iguchi, T. Matsubara, Y. Machida, B. Salce, J. Flouquet, H. Ogusu, J. Yamaura, Z. Hiroi, and K. Izawa, J. Phys. Soc. Jpn. 82, 114708 (2013). Selected as Editors’ choice. DOI:10.7566/JPSJ.82.114708
Verification of the Wiedemann-Franz Law in YbRh₂Si₂ at a Quantum Critical Point Y. Machida, K. Tomokuni, K. Izawa, G. Lapertot, G. Knebel, J.-P. Brison, and J. Flouquet, Phys. Rev. Lett. 110, 236402 (2013). DOI:10.1103/PhysRevLett.110.236402
Magnetic Field Driven Electronic Singularities through Metamag- netic Phenomena: Case of the Heavy Fermion Antiferromagnet Ce(Ru_0.92Rh_0.08)₂Si₂ Y. Machida, K. Izawa, D. Aoki, G. Knebel, A. Pourret, and J. Flouquet, J. Phys. Soc. Jpn. 82, 054704 (2013). DOI:10.7566/JPSJ.82.054704
Thermoelectric response near a quantum critical point of β-YbAlB₄ and YbRh₂Si₂: A comparative study Y. Machida, K. Tomokuni, C. Ogura, K. Izawa, K. Kuga, S. Nakatsuji, G. Lapertot, G. Knebel, J.-P. Brison, and J. Flouquet, Phys. Rev. Lett. 109, 156405 (2012). DOI:10.1103/PhysRevLett.109.156405
Twofold spontaneous symmetry breaking in a heavy fermion superconductor UPt₃ Y. Machida, A. Itoh, Y. So, K. Izawa, Y. Haga, E. Yamamoto, N. Kimura, Y. Onuki, Y. Tsutsumi, and K. Machida, Phys. Rev. Lett. 108, 157002 (2012). DOI:10.1103/PhysRevLett.108.157002
Enhanced quasiparticle heat conduction of the multigap superconductor Lu₂Fe₃Si₅ Y. Machida, S. Sakai, K. Izawa, H. Okuyama, and T. Watanabe, Phys. Rev. Lett. 106, 107002 (2011). DOI:10.1103/PhysRevLett.106.107002
Superconducting and Structural Transitions in the β-Pyrochlore Oxide KOs₂O₆ under High Pressure H. Ogusu, N. Takeshita, K. Izawa, J.I. Yamaura, Y. Oishi, S. Tsutsui, Y. Okamoto, Z. Hiroi, J. Phys. Soc. Jpn., 79, 114710 1-6 (2010). DOI:10.1143/JPSJ.79.114710
Possible Sign-Reversing s-Wave Superconductivity in Co-Doped BaFe₂As₂ Proved by Thermal Transport Measurements Y. Machida, K. Tomokuni, T. Isono, K Izawa, Y. Nakajima, T. Tamegai, J. Phys. Soc. Jpn. 78, 073705(2009). DOI:10.1143/JPSJ.78.073705
Re-examination of the crystal structure of the beta-pyrochlore oxide superconductor KOs₂O₆ by X-ray and convergent-beam electron diffraction analyses JI. Yamaura, Z. Hiroi, K. Tsuda, K. Izawa, Y. Ohishi, S. Tsutsui, Solid State Comm. 149, 31-34 (2009). DOI:10.1016/j.ssc.2008.10.029
Transport anomalies across the quantum limit in semimetallic Bi_0.96Sb_0.04 A. Banerjee, B. Fauque, K. Izawa, A. Miyake, I. Sheikin, J. Flouquet, B. Lenoir, K. Behnia, Phys. Rev. B 78, 161103 (2008). DOI:10.1103/PhysRevB.78.161103
Temperature-pressure phase diagram of URu₂Si₂ from resistivity measurements and ac calorimetry: Hidden order and Fermi-surface nesting E. Hassinger, G. Knebel, K. Izawa, P. Lejay, B. Salce and J. Flouquet, Phys. Rev. B 77, 115117 (2008). DOI:10.1103/PhysRevB.77.115117
Thermoelectric Response Near a Quantum Critical Point: The Case of CeCoIn₅ K. Izawa, K. Behnia, Y. Matsuda, H. Shishido, R. Settai, Y. Onuki, and J. Flouquet, Phys. Rev. Lett. 99, 147005 (2007). DOI:10.1103/PhysRevLett.99.147005
Non-fermi liquid behavior in the magnetotransport of CeMln₅ (M : Co and Rh): Striking similarity between quasi two-dimensional heavy fermion and high-T_c cuprates Y. Nakajima, H. Shishido, H. Nakai, T. Shibauchi, K. Behnia, K. Izawa, M. Hedo, Y. Uwatoko, T. Matsumoto, R. Settai, Y. Onuki, H. Kontani, and Y. Matsuda, J. Phys. Soc. Jpn. 76, 024703 (2007). DOI:10.1143/JPSJ.76.024703
Nodal structure of unconventional superconductors probed by angle resolved thermal transport measurements Y.Matsuda, K. Izawa, I. Vekhter, J. Phys.: Condens. Matter 18, R705-752 (2006). DOI:10.1088/0953-8984/18/44/R01
Evolution of Hall coefficient in two-dimensional heavy fermion CeCoIn₅ Y. Nakajima, K. Izawa, Y. Matsuda, K. Behnia, H. Kontani, M. Hedo, Y. Uwatoko, T. Matsumoto, H. Shishido, R. Settai, Y. Onuki, J. Phys. Soc. Jpn. 75, 023705 (2006). DOI:10.1143/JPSJ.75.023705
Anomalous quasiparticle transport in the superconducting state of CeCoIn₅ Y. Kasahara, Y. Nakajima, K. Izawa, Y. Matsuda, K. Behnia, H. Shishido, R. Settai, Y. Onuki, Phys. Rev. B 72, 214515 (2005). DOI:10.1103/PhysRevB.72.214515
Multiband superconductivity in the heavy fermion compound PrOs₄Sb₁₂ G. Seyfarth, J.P. Brison, M.A. Measson, J. Flouquet, K. Izawa, Y. Matsuda, H. Sugawara, H. Sato, Phys. Rev. Lett. 95, 107004 (2005). DOI:10.1103/PhysRevLett.95.107004
Field-angle-resolved specific heat and thermal conductivity in the vortex phase of UPd₂Al₃ P. Thalmeier, T. Watanabe, K. Izawa, Y. Matsuda, Phys. Rev. B 72, 024539 (2005). DOI:10.1103/PhysRevB.72.024539
Line nodes in the superconducting gap function of noncentrosymmetric CePt₃Si Koichi Izawa, Y. Kasahara, Y. Matsuda, K. Behnia, T. Yasuda, R. Settai, Y. Onuki, Phys. Rev. Lett. 94, 197002 (2005). DOI:10.1103/PhysRevLett.94.197002
Thermal transport in the hidden-order state of URu₂Si₂ K. Behnia, R. Bel, Y. Kasahara, Y. Nakajima, H. Jin, H. Aubin, K. Izawa, Y. Matsuda, J. Flouquet, Y. Haga, Y. Onuki, P. Lejay, Phys. Rev. Lett. 94, 156405 (2005). DOI:10.1103/PhysRevLett.94.156405
Superconducting gap function in antiferromagnetic heavy-fermion UPd₂Al₃ probed by angle-resolved magnetothermal transport measurements T. Watanabe, K. Izawa, Y. Kasahara, Y. Haga, Y. Onuki, P. Thalmeier, K. Maki, Y. Matsuda, Phys. Rev. B 70, 184502 (2004). DOI:10.1103/PhysRevB.70.184502
Triplet superconductivity in the skutterudite PrOs₄Sb₁₂ K.Maki, S. Haas, D. Parker, H. Won, K. Izawa, Y. Matsuda, Europhys. Lett. 68, 720-725 (2004). DOI:10.1209/epl/i2004-10268-4
Flux-Line Lattice Distortion in PrOs₄Sb₁₂ A.D. Huxley, M.-A. Measson, K. Izawa, C.D. Dewhurst, R. Cubbit, B. Grenier, H. Sugawara, J. Flouquet, Y. Matsuda H. Sato, Phys. Rev. Lett. 93, 187005 (2004). DOI:10.1103/PhysRevLett.93.187005
Gap symmetry of superconductivity in UPd₂Al₃ H.Won, D.Parker, K.Maki, T.Watanabe, K. Izawa, and Y. Matsuda, Phys. Rev. B 70, 140509 (2004). DOI:10.1103/PhysRevB.70.140509
High-field state of the flux-line lattice in the unconventional superconductor CeCoIn₅ T. Watanabe, Y. Kasahara, K. Izawa, T. Sakakibara, Y. Matsuda, C.J. van der Beek, T. Hanaguri, H. Shishido, R.Settai, Y. Onuki, Phys. Rev. B 70, 020506 (2004). DOI:10.1103/PhysRevB.70.020506
Giant Nernst effect in CeCoIn₅ R. Bel, K. Behnia, Y. Nakajima, K. Izawa, Y. Matsuda, H. Shishido, R. Settai, Y. Onuki, Phys. Rev. Lett. 92, 217002(2004). DOI:10.1103/PhysRevLett.92.217002
Normal-state hall angle and magnetoresistance in Quasi-2D heavy fermion CeCoIn₅ near a quantum critical point Y. Nakajima, K. Izawa, Y. Matsuda, S. Uji, T. Terashima, H. Shishido, R. Settai, Y. Onuki, H. Kontani, J. Phys. Soc. Jpn. 73, 5-8(2004). DOI:10.1143/JPSJ.73.5
Multiphase superconductivity in skutterudite PrOs₄Sb₁₂ Kazumi Maki, H. Won, Peter Thalmeier, Q. Yuan, Koichi Izawa, Yuji Matsuda, Euro Phys. Lett. 64, 496-502 (2003). DOI:10.1209/epl/i2003-00250-2
Anomalous flux flow resistivity in the two-gap superconductor MgB₂ Akinori Shibata, Mari Matsumoto, Koichi Izawa, Yuji Matsuda, S. Lee, Setsuko Tajima, Phys. Rev. B 68, 060501 (2003). DOI:10.1103/PhysRevB.68.060501
Multiple superconducting phases in new heavy fermion superconductor PrOs₄Sb₁₂ Koichi Izawa, Yasuyuki Nakajima, Jun Goryo, Yuji Matsuda, Shuji Osaki, Hitoshi Sugawara, Hidenori Sato, Peter Thalmeier, and Kazumi Maki, Phys. Rev. Lett. 90, 117001 (2003). DOI:10.1103/PhysRevLett.90.117001
Gap Function with Point Nodes in Borocarbide Superconductor YNi₂B₂C Koichi Izawa, Konomi Kamata, Yasuyuki Nakajima, Yuji Matsuda, Tadataka Watanabe, Minoru Nohara, Hidenori Takagi, Peter Thalmeier and Kazumi Maki, Phys. Rev. Lett. 89, 137006 (2002). DOI:10.1103/PhysRevLett.89.137006
Free flux flow resistivity in a strongly overdoped high-T_c cuprate: The purely viscous motion of the vortices in a semiclassical d-wave superconductor Yuji Matsuda, Akinori Shibata, Koichi Izawa, H. Ikuta, Masashi Hasegawa, Yusuke Kato, Phys. Rev. B66, 014527 (2002). DOI:10.1103/PhysRevB.66.014527
Superconducting Gap Structure of κ-(BEDT-TTF)₂Cu(NCS)₂ Probed by Thermal Conductivity Tensor Koichi Izawa, Hedemasa Yamaguchi, Takahiko Sasaki, Yuji Matsuda, Phys. Rev. Lett. 88, 027002 (2002). DOI:10.1103/PhysRevLett.88.027002
Angular Position of Nodes in the Superconducting Gap of Quasi-2D Heavy-Fermion Superconductor CeCoIn₅ Koichi Izawa, Hidemasa Yamaguchi, Yuji Matsuda, Hiroaki Shishido, Rikio Settai, and Yoshichika Onuki, Phys. Rev. Lett. 87, 057002 (2001). DOI:10.1103/PhysRevLett.87.057002
Superconducting gap structure of spin-triplet superconductor Sr₂RuO₄ studied by thermal conductivity Koichi Izawa, Hidekazu Takahashi, Hidemasa Yamaguchi, Yuji Matsuda, Masatoshi Suzuki, Takahiko Sasaki, Tetsuo Fukase, Yoshiyuki Yoshida, Rikio Settai, and Yoshichika Onuki, Phys. Rev. Lett. 86, 2653-2656 (2001). DOI:10.1103/PhysRevLett.86.2653
Low energy quasiparticle excitation in the vortex state of borocarbide superconductor YNi₂B₂C Koichi Izawa, Akinori Shibata, Yuji Matsuda, Yusuke Kato, Hiroyuki Takeya, Kazuto Hirata, C.J. van der Beek and Marcin Konczykowsky, Phys. Rev. Lett. 86, 1327-1330 (2001). DOI:10.1103/PhysRevLett.86.1327
Metallic ground state of CeNiSn K. Izawa, T. Suzuki, T. Fujita, T. Takabatake, G. Nakamoto, H. Fujii, and K. Maezawa, Phys. Rev. B 59, 2599-2603 (1999). DOI:10.1103/PhysRevB.59.2599
Giant magnetoresistance in Ce₂Fe₁₇ Y. Janssen, H. Fujii, T. Ekino, K. Izawa, T. Suzuki, T. Fujita, and F.R. de Boer, Phys. Rev. B 56, 13716-13719 (1997). DOI:10.1103/PhysRevB.56.13716
Magnetic Property of CeNiC₂ Studied by Macroscopic and Microscopic Measurements K. Motoya, K. Nakaguchi, N. Kayama, K. Inari, J. Akimitsu, K. Izawa, and T. Fujita, J. Phys. Soc. Jpn. 66, 1124-1129 (1997). DOI:10.1143/JPSJ.66.1124
The Origin of Magnetic Field Dependence of Specific Heat in Single-Crystalline CeNiSn K. Izawa, T. Suzuki, M. Kitamura, T. Fujita,T. Takabatake, G. Nakamoto, H. Fujii, and K. Maezawa, J. Phys. Soc. Jpn. 65, 3119-3122 (1996). DOI:10.1143/JPSJ.65.3119
Different Electronic Ground States in the Hexagonal and Cubic Phases of UAu₂Sn K. Izawa, T. Suzuki, T. Fujita, Y. Maeda, T. Takabatake, and H. Fujii, J. Phys. Soc. Jpn. 65, 3260-3265 (1996). DOI:10.1143/JPSJ.65.3260

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Non-Fermi Liquid Properties in a Cubic Pr-Based Compound PrPb₃ under Magnetic Fields T. Yoshida, Y. Machida, K. Izawa, T. Onimaru, and H. S. Suzuki, J. Phys.: Cof. Ser. 683, 012031 (2016). DOI:10.1088/1742-6596/683/1/012031
Common Anomalies of Transport Properties in PrTr₂Zn₂₀ (Tr = Ir, Rh) with Non-Kramers Doublet Ground State T. Yoshida, Y. Machida, K. Izawa, Y. Shimada, N. Nagasawa, T. Onimaru, and T. Takabatake, Phys. Procedia 75, 529 (2015). DOI:10.1016/j.phpro.2015.12.067
Development of Field Angle Resolved Specific Heat Measurement System for Unconventional Superconductors Y. Kitamura, T. Matsubara, Y. Machida, Y. Onuki, B. Salce, J. Flouquet, and K. Izawa, J. Phys.: Cof. Ser. 592, 012148 (2015). DOI:10.1088/1742-6596/592/1/012148
Anomalous Enhancement of Seebeck Coefficient in Pr-Based1-2-20 System with Non-Kramers Doublet Ground States Y. Machida, T. Yoshida, T. Ikeura, K. Izawa, A. Nakama, R. Higashinaka, Y. Aoki, H. Sato, A. Sakai, S. Nakatsuji, N. Nagasawa, K. Matsumoto, T. Onimaru, and T. Takabatake, J. Phys.: Cof. Ser. 592, 012025 (2015). DOI:10.1088/1742-6596/592/1/012025
Anomalous Enhancement of Seebeck Coefficient in PrIr₂Zn₂₀ T. Ikeura, T. Matsubara, Y. Machida, K. Izawa, N. Nagasawa, K. T. Matsumoto, T. Onimaru, and T. Takabatake, JPS Conf. Proc. 3, 011091 (2014). DOI:10.7566/JPSCP.3.011091
Pressure dependence of upper critical field in β-pyrochlore oxides D. Iguchi, T. Isono, Y. Machida, K. Izawa, B. Salce, J. Flouquet, H. Ogusu, J. Yamaura, and Z. Hiroi, J. Phys. Soc. Jpn. 80, SA040 (2011). DOI:10.1143/JPSJS.80SA.SA040
Crystal structure and superconductivity of β-pyrochlore oxides under high pressure T. Isono, Y. Hara, D. Iguchi, Y. Machida, K. Izawa, S. Tsutsui, T. Matsuoka, Y. Ohishi, B. Salce, J. Flouquet, H. Ogusu, J-I. Yamaura, and Z. Hiroi, J. Phys. Soc. Jpn. 80, SA041 (2011). DOI:10.1143/JPSJS.80SA.SA041
Thermoelectric coefficients of the quantum critical β-YbAlB₄ Y. Machida, C. Ogura, K. Izawa, K. Kuga, and S. Nakatsuji, J. Phys. Soc. Jpn. 80, SA088 (2011). DOI:10.1143/JPSJS.80SA.SA088
Low-temperature thermal transport coefficients of heavy fermion β-YbAlB₄ Y. Machida, C. Ogura, K. Izawa, K. Kuga and S. Nakatsuji, J. Phys.: Conf. Ser. 273, 012005 (2011). DOI:10.1088/1742-6596/273/1/012005
Pressure effect on the superconductivity of β-pyrochlore oxides T. Isono, D. Iguchi, Y. Machida, K. Izawa, B. Salce, J. Flouquet, H. Ogusu, J. Yamaura and Z. Hiroi, J. Phys. : Conf. Ser. 273 012076 (2011). DOI:10.1088/1742-6596/273/1/012076
Thermal transport properties and quantum criticality of heavy fermion YbRh₂Si₂ K. Tomokuni, Y. Machida, K. Izawa, G. Lapertot, G. Knebel, J-P. Brison and J. Flouquet, J. Phys. Soc. Jpn. 80, SA096 (2011). DOI:10.1143/JPSJS.80SA.SA096
Thermal conductivity tensor of single crystalline Co-doped BaFe₂As₂ Y. Machida, K. Tomokuni, T. Isono, K. Izawa, Y. Nakajima, T. Tamegai, Physica E, 43, 714 (2011). DOI:10.1016/j.physe.2010.07.036
Low temperature specific heat of the β-pyrochlore superconductors under high pressure T. Isono D.Iguchi Y. Machida, K. Izawa, B. Salce, J. Flouquet, H. Ogusu, J. Yamaura, Z. Hiroi, Physica C 470, S721-S722 (2010). DOI:10.1016/j.physc.2009.11.109
Thermal transport studies on Co-doped BaFe₂As₂ Y. Machida, K. Tomokuni, T. Isono, K. Izawa, Y. Nakajima, T. Tamegai, Physica C 470, S478-S479 (2010). DOI:10.1016/j.physc.2009.12.018
Low-temperature specific heat of the β-pyrochlore oxide superconductors under high pressure T. Isono, D. Iguchi, Y. Machida, K. Izawa, B. Salce, J. Flouquet, H. Ogusu, J. Yamaura, Z. Hiroi, Physica E, 43, 726 (2011). DOI:10.1016/j.physe.2010.07.039
Non-Fermi liquid behavior in the magnetotransport of quasi two-dimensional heavy Fermion compounds CeMIn₅ Y. Nakajima, T. Shibauchi, H. Shishido, H. Nakai, K. Behnia, K. Izawa, M. Hedo, Y. Uwatoko, T. Matsumoto, R. Settai, Y. Onuki, H. Kontani, Y. Matsuda, J. Phys. Chem. Solids 69, 3261-3264 (2008). DOI:10.1016/j.jpcs.2008.06.064
Striking similarities between HTSC and quasi-2D HFCeRIn₅ K. Izawa, Y. Nakajima, Y. Kasahara, R. Bel, K. Behnia, H. Shishido, R. Settai, Y. Onuki, H. Kontani, Y. Matsuda, Physica C 460, 145-148 (2007). DOI:10.1016/j.physc.2007.04.004
Unusual Hall effect in quasi two-dimensional strongly correlated metal CeCoIn₅ Y. Nakajima, H. Shishido, K. Izawa, Y. Matsuda, H. Kontani, H. Hedo, Y. Uwatoko, T. Matsumoto, R. Settai, and Y. Onuki, Physica C 460, 680-681 (2007). DOI:10.1016/j.physc.2007.03.082
Interplay between different states in heavy-fermion physics G. Knebel, K. Izawa, F. Boudarot, E. Hassinger, B. Salce, D. Aoki, and J. Flouquet, J. Magn. Magn. Matter 310, 195-200 (2007). DOI:10.1016/j.jmmm.2006.10.007
Hall effect in the quasi two-dimensional strongly correlated metal CeMIn₅ (M = Co, Rh) Y. Nakajima, H. Shishido, H. Nakai, T. Shibauchi, K. Izawa, K. Behnia, H. Hedo, Y. Uwatoko, T. Matsumoto, R. Settai, Y. Onuki, H. Kointani, and Y. Matsuda, J. Magn. Magn. Matter 310, 334-336 (2007). DOI:10.1016/j.jmmm.2006.10.028
Giant Nernst effect in heavy-electron metals K. Behnia, R. Bel, A. Pourret, K. Izawa, J. Flouquet, Y. Nakajima, Y. Matsuda, D. Kikuchi, Y. Aoki, H. Sugawara and H. Sato, J. Magn. Magn. Matter 310, 446-448 (2007). DOI:10.1016/j.jmmm.2006.10.897
Anomalous quasiparticle transport and superclean superconducting state of CeCoIn₅ Y. Kasahara, Y. Nakajima, K. Izawa, Y. Matsuda, K. Behnia, H. Shishido, R. Settai and Y. Onuki, J. Magn. Magn. Matter 310, 569-571 (2007). DOI:10.1016/j.jmmm.2006.10.154
Pressure effect of electrical resistivity and AC specific heat in CePtAl M. Nakashima, T. Ueda, K. Shimizu, H. Nakashima, A. Thamizhavel, N. Tateiwa, Y. Haga, M. Hedo, Y. Uwatoko, R. Settai, Y. Onuki, K. Izawa, G. Knebel, B. Salce and J. Flouquet, J. Magn. Magn. Matter 310, E9-E11 (2007). DOI:10.1016/j.jmmm.2006.10.056
Low-temperature thermal conductivity of noncentrosymmetric CePt₃Si K. Izawa, Y. Kasahara, Y. Matsuda, K. Behnia, T. Yasuda, R. Settai, Y. Onuki, Physica B 378-380, 361-362 (2006). DOI:10.1016/j.physb.2006.01.128
New high magnetic state of flux line lattce in CeCoIn₅ Y. Kasahara, T. Watanabe, K. Izawa, T.Sakakibara, CJ van der Beek, T. Hanaguri, M. Nohara, H. Takagi, H. SHishido, R. Settai, Y. Onuki, Y. Matsuda, Physica C 426, 36-40 (2005). DOI:10.1016/j.physc.2005.02.018
Superconducting gap structure of antiferromagnetic heavy-fermion superconductor UPd₂Al₃ studied by thermal conductivity measurements with rotating magnetic field T. Watanabe, K. Izawa, Y. Kasahara, Y. Haga, Y. Onuki, P. Thalmeier, K. Maki, Y. Matsuda, Physica C 426, 234-239 (2005). DOI:10.1016/j.physc.2004.12.018
Multiple superconducting phases in heavy fermion superconductors Y. Matsuda, K. Izawa, T. Watanabe, Y. Kasahara, Y. Nakajima, T. Sakakibara, CJ. van der Beek, M. Nohara, T. Hanaguri, H. Takagi, J. Goryo, K. Maki, P. Thalmeier, S. Osaki, H. Sugawara, H. Sato, H. Shishido, R. Settai, Y. Onuki, J. Phys. Chem. Sol. 66, 1365-1369 (2005). DOI:10.1016/j.jpcs.2005.05.012
Triplet superconductivity in PrOs₄Sb₁₂ K. Maki, H. Won, D. Parker, S. Haas, K. Izawa, Y. Matsuda, Physica B 359, 527-529 (2005). DOI:10.1016/j.physb.2005.01.136
Superconductivity of the filled skuterrudite PrOs₄Sb₁₂: Phase diagram and characterisations M.A. Measson, J.P. Brison, G. Seyfarth, D. Braithwaite, G. Lapertot, B. Salce, J. Flouquet, E. Lhotel, C. Paulsen, H. Sugawara, H. Sato, P.C. Canfield, K. Izawa, Y. Matsuda, Physica B 359, 827-829 (2005). DOI:10.1016/j.physb.2005.01.242
Observation of a symmetry change in the gap function in heavy-fermion superconductor PrOs₄Sb₁₂ K. Izawa,Y. Nakajima, J. Goryo, Y. Matsuda, S. Osaki, H. Sugawara, H. Sato, P. Thalmeier, K. Maki, J. Magn. Magn. Matter 272-276, 144-145 (2004). DOI:10.1016/j.jmmm.2003.12.1018
Anomalous flux flow resistivity of MgB₂ M. Matsumoto, A. Shibata, K. Izawa,Y. Matsuda, S. Lee, S. Tajima, Physica C 412-414, 397-401 (2004). DOI:10.1016/j.physc.2004.01.060
Observation of a symmetry change in the gap function in PrOs₄Sb₁₂ Koichi Izawa, and Yuji Matsuda, Physica C 412-414, 21-26 (2004). DOI:10.1016/j.physc.2004.01.035
Gap structure and anomalous superconducting state of quasi-2D heavy-fermion CeCoIn₅ Koichi Izawa, Hidemasa Yamaguchi, Yuji Matsuda, Hiroaki Shishido, Rikio Settai, Yoshichika Onuki, Physica C 388-389, 537-538 (2003). DOI:10.1016/S0921-4534(02)02730-2
Evidence of point nodes in superconducting gap of borocarbide superconductor YNi₂B₂C Konomi Kamata, Koichi Izawa, Yasuyuki Nakajima, Yuji Matsuda, Tadataka Watanabe, Minoru Nohara, Hidenori Takagi, Hiroyuki Takeya, Kazuto Hirata, Peter Thalmeier, Kazumi Maki, Physica C 388-389, 185-186 (2003). DOI:10.1016/S0921-4534(02)02719-3
Determination of the directions of gap nodes in exotic superconductors Yuji Matsuda, Koichi Izawa , Physica C 388-389, 487-488 (2003). DOI:10.1016/S0921-4534(02)02389-4
Purely viscous motion of the vortices in semiclassical d-wave superconductor Yuji Matsuda, Koichi Izawa, Akinori Shibata, H. Ikura, Masashi Hasegawa, Yusuke Kato, Physica C 388-389, 709-710 (2003). DOI:10.1016/S0921-4534(02)02484-X
Superconducting Gap Structure of YNi₂B₂C determined by Thermal Conductivity Konomi Kamata, Koichi Izawa, Yasuyuki Nakajima, Yuji Matsuda, Tadataka Watanabe, Minoru Nohara, Hedenori Takagi, Hiroyuki Takeya, Kazuto Hirata, Peter Thalmeier, Kazumi Maki, J. Low Temp. Phys. 131, 1095-1099 (2003). DOI:10.1023/A:1023453127025
Nodal structure of unconventional superconductors determined by thermal conductivity Koichi Izawa, Yuji Matsuda, J. Low Temp. Phys. 131, 429-433 (2003). DOI:10.1023/A:1022982715521
Nodal structure of unconventional superconductors determined by thermal conductivity Yuji Matsuda, Koichi Izawa, Acta. Phys. Pol. B 34, 579-582 (2003). LINK
Growth and Upper Critical Field of Heavily Overdoped Tl₂Ba₂CuO_x Single Crystals Masashi Hasegawa, Koichi Izawa, Akinori Shibata, and Yuji Matsuda, Physica C 377, 459 (2002). DOI:10.1016/S0921-4534(01)01303-X
Quasiparticle structure in the vortex state of anisotropic s-wave superconductor YNi₂B₂C Akinori Shibata, Koichi Izawa, Yuji Matsuda, Yusuke Kato, Hiroyuki Takeya, C.J. van der Beek, Marcin Knczykowski, J. Phys. Chem. Sol. 63, 991-993 (2002). DOI:10.1016/S0022-3697(02)00114-2
Probing the nodal structure in quasi-2D unconventional superconductors by thermal conductivity Koichi Izawa, Hidemasa Yamaguchi, Yuji Matsuda, Takahiko Sasaki, Rikio Settai, and Yoshichika Onuki, J. Phys. Chem. Sol. 63, 1055-1059 (2002). DOI:10.1016/S0022-3697(02)00134-8
Angular Position of Nodes in the Superconducting Gap of 2D Unconventional Superconductors Koichi Izawa, Hidemasa Yamaguchi, Yuji Matsuda, Takahiko Sasaki, Tetsuo Fukase, Yoshiyuki Yoshida, Rikio Settai, and Yoshichika Onuki, Physica C 367, 15-19 (2001). DOI:10.1016/S0921-4534(01)00979-0
Unusual microwave vortex dissipation of Nd_1.85Ce_0.15CuO₄ Akinori Shibata, Koichi Izawa, Yuji Matsuda, Y. Saito, Kazuto Hirata, Physica C 357, 517-519 (2001). DOI:10.1016/S0921-4534(01)00339-2
Heat capacity of YNi₂B₂C in the vortex state: an evidence of the extended s-wave state Koichi Izawa, Akinori Shibata, Yuji Matsuda, Yusuke Kato, Hiroyuki Takeya, Kazuto Hirata, C.J. van der Beek and Marcin Konczykowsky, Physica C 357, 513-516 (2001). DOI:10.1016/S0921-4534(01)00338-0
Crystal growth techniques for Tl-based cuprate superconductors Masashi Hasegawa, H Takei, Koichi Izawa, Yuji Matsuda, J. Cryst. Growth 229, 401-404 (2001). DOI:10.1016/S0022-0248(01)01189-7
Anomalous Microwave Response and Upper Critical Field in Overdoped Tl₂Ba₂CuO_6+d Koichi Izawa, Akinori Shibata, Hidekazu Takahashi, Yuji Matsuda, Masashi Hasegawa, Noriko Chikumoto, C.J. van der Beek and Marcin Konczykowsky, Advances in Superconductivitiy XII, 293 (Springer-Verlag, Tokyo, 2000). Link
Microwave Flux Flow Resistivity of Clean Limit Superconductor YNi₂B₂C Akinori Shibata, Koichi Izawa, Yuji Matusda, Hiroyuki Takeya, Akira Kamimura and Kazuto Hirata, Advances in Superconductivitiy XII, 380 (Springer-Verlag, Tokyo, 2000). Link
Growth and Characterization of Single Crystals of Tl-Based Cuprate Superconductors Masashi Hasegawa, H. Takei, Koichi Izawa and Yuji Matsuda, Advances in Superconductivitiy XII, 107 (Springer-Verlag, Tokyo, 2000). Link
Microwave Surface Impedance in Overdoped Tl₂Ba₂CuO_6+d Koichi Izawa, Akinori Shibata, Hidekazu Takahashi, Yuji Matsuda, Masashi Hasegawa, Noriko Chikumoto, C.J. van der Beek and Marcin Konczykowsky, Physica B 284-288, 945-946 (2000). DOI:10.1016/S0921-4526(99)02263-2
Flux Flow Resistance and Transmittivity in Overdoped Tl₂Ba₂CuO_6+d Koichi Izawa, Akinori Shibata, Hidekazu Takahashi, Yuji Matsuda, Masashi Hasegawa, Noriko Chikumoto, C.J. van der Beek and Marcin Konczykowsky, J. Low Temp. Phys. 117, 1193-1197 (1999). DOI:10.1023/A:1022519617094
Growth and Characterization of Tl₂Ba₂CuO_6+d Single Crystals Masashi Hasegawa, H. Takei, Koichi Izawa and Yuji Matsuda, J. Low Temp. Phys. 117, 741-745 (1999). DOI:10.1023/A:1022549329077
Specific heat of YbPtSn T. Suzuki, Y. Matsumoto, F. Masaki, K. Izawa, M. Ito, K. Katoh, T. Takabatake, T. Fujita, Physica B 261,146-147 (1999). DOI:10.1016/S0921-4526(98)00631-0
Anomalous field dependence of specific heat of CeNiSn below 1K K. Izawa, T. Suzuki, T. Fujita,T. Takabatake, G. Nakamoto, H. Fujii, and K. Maezawa, J. Magn. Magn. Mater. 177-181, 395-396 (1998). DOI:10.1016/S0304-8853(97)00408-3
Ce- and Yb-based Kondo semiconductors T. Takabatake, F. Iga, T. Yoshino, Y. Echizen, K. Kobayashi, M. Higa, K. Katoh, N. Shimizu, Y. Bando, G. Nakamoto, H. Fujii, K. Izawa, T. Suzuki, T. Fujita, M. Sera, M. Hiroi, K. Maezawa, S. Mock, H.v. Löeysen, A. Brükl, K. Neumaier, and K. Andres, J. Magn. Magn. Mater. 177-181, 277-282 (1998). DOI:10.1016/S0304-8853(97)00842-1
Effect of high magnetic field on gap formation in CeNiSn K. Izawa, T. Suzuki, M. Kitamura, T. Fujita, G. Nakamoto, T. Takabatake, and H. Fujii, Physica B 230-232, 670-672 (1997). DOI:10.1016/S0921-4526(96)00785-5
Localization effects in Kondo semimetals CeNiSn and CeRhSb T. Takabatake, G. Nakamoto, Y. Yoshino, H. Fujii, K. Izawa, S. Nishigori, H. Goshima, T. Suzuki, T. Fujita, K. Maezawa, T. Hiraoka, Y. Okayama, I. Oguro, A.A. Menovsky, K. Neumaier, A. Brükl, and K. Andres, Physica B 223&224, 413-420 (1996). DOI:10.1016/0921-4526(96)00137-8
Double magnetic transitions in UPt₂In Y. Maeda, T. Takabatake, Y. Bando, H. Fujii, K. Oda, K. Sugiyama, K. Kindo, K. Izawa, T. Suzuki, T. Fujita, and Y. Morii, Physica B 223&224, 228-230 (1996). DOI:10.1016/0921-4526(96)00085-3
Effect of impurity phases on the anisotropic transport properties of CeNiSn G. Nakamoto, T. Takabatake, Y. Bando, H. Fujii, K. Izawa, T. Suzuki, T. Fujita, A. Minami, I. Oguro, L.T. Tai, and A.A. Menovsky, Physica B 206&207, 840-843 (1995). DOI:10.1016/0921-4526(94)00602-R
Polymorphism and heavy-fermion behavior in UAu₂Sn Y. Maeda, T. Takabatake, H. Fujii, K. Izawa, T. Suzuki, T. Fujita, A. Minami, K. Oda, K. Sugiyama, and K. Kindo, J. Magn. Magn. Mater. 140-144, 1363-1364 (1995). DOI:10.1016/0304-8853(94)00610-5

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解説・書籍

「フレキシブル熱電変換材料の開発と応用」 第3章　有機強相関材料における巨大ゼーベック効果 町田洋, 井澤公一, シーエムシー出版, ISBNコード： 978-4-7813-1255-2
重い電子系超伝導体 UPt₃ における自発的に回転対称性の破れた超伝導 井澤公一, 町田洋, 固体物理 49, 345 (2014).
ポイントノードをもつ超伝導体YNi₂B₂C 井澤公一, 鎌田このみ, 松田祐司, 日本物理学会誌 59, 92-96 (2004).
準２次元異方的超伝導体の超伝導ギャップ構造 井澤公一, 松田祐司, 固体物理 37, 235-252 (2002).

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