2013 Fiscal Year Final Research Report
High pressure quantum oscillation measurement of the pressure-induced iron-based superconductor and development of 4GPa class high pressure apparatus
| Project/Area Number |
23740279
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| Research Category |
Grant-in-Aid for Young Scientists (B)
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| Allocation Type | Multi-year Fund |
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| Research Field |
Condensed matter physics II
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| Research Institution | Tokyo Institute of Technology (2012-2013)
National Institute for Materials Science (2011) |
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Principal Investigator |
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| Project Period (FY) |
2011 – 2013
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| Keywords | 鉄系超伝導体 / 圧力誘起超伝導 / 量子振動 / 輸送特性 |
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| Research Abstract |
We have investigated transport properties and quantum oscillation effect in the pressure-induced superconductor EuFe2As2 under high pressure. Detailed analyses of the resistivity, Hall effect, and upper critical field indicate no divergence of quasiparticle effective mass at the critical pressure Pc where the magnetic and structural transition disappears. On the other hand, we have shown that the scattering rates for both electrons and holes are approximately T-linear for P>Pc. The recovery of the Fermi liquid-like T2 dependence of resistivity at high fields clearly indicates that spin fluctuations are the origin of the anomalous scattering. In addition, we have studied pressure evolutions of the Shubnikov-de Haas frequencies and quasiparticle effective mass.
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[Journal Article] Fermi surface in KFe_2As_2 determined via de Haas-van Alphen oscillation measurements2013
Author(s)
T. Terashima, N. Kurita, M. Kimata, M. Tomita, S. Tsuchiya, M. Imai, A. Sato, K. Kihou, C.-H. Lee, H. Kito, H. Eisaki, A. Iyo, T. Saito, H. Fukazawa, Y. Kohori, H. Harima, S. Uji
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Journal Title
Phys. Rev. B
Volume: 87
Pages: 224512
Peer Reviewed
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[Journal Article] Complete Fermi surface in BaFe_2As_2 observed via quantum oscillation measurements on detwinned single crystals2011
Author(s)
T. Terashima, N. Kurita, M. Tomita, K. Kihou, C.-H. Lee, Y. Tomioka, T. Ito, A. Iyo, H. Eisaki, T. Liang, M. Nakajima, S. Ishida, S. Uchida, H. Harima, S. Uji
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Journal Title
Phys. Rev. Lett
Volume: 107
Pages: 176402
Peer Reviewed
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[Journal Article] Cyclotron resonance and mass enhancement by electron correlation in KFe_2As_22011
Author(s)
M. Kimata, T. Terashima, N. Kurita, H. Satsukawa, A. Harada, K. Kodama, K. Takehara, Y. Imanaka, T. Takamasu, K. Kihou, C.-H. Lee, H. Kito, H. Eisaki, A. Iyo, H. Fukazawa, Y. Kohori, H. Harima, S. Uji
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Journal Title
Phys. Rev. Lett
Volume: 107
Pages: 166402
Peer Reviewed
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[Presentation] 鉄系超伝導体LiFeAs の上部臨界磁場2011
Author(s)
栗田伸之, 北川健太郎, 松林和幸, A. Kismarahardja, E.-S. Choi, J. S. Brooks, 上床美也, 宇治進也, 寺嶋太一
Organizer
日本物理学会秋季大会
Place of Presentation
富山大学
Year and Date
2011-09-21
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[Presentation] Upper critical field and de Haas-van Alphen oscillations in pressure-induced superconductor EuFe_2As_22011
Author(s)
N. Kurita, M. Kimata, K. Kodama, A. Harada, M. Tomita, H. S. Suzuki, T. Matsumoto, K. Murata, S. Uji, T. Terashima
Organizer
International Conference on Strongly Correlated Electron Systems
Place of Presentation
Cambridge, UK
Year and Date
2011-08-29
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