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Antiferromagnetic Fluctuations in the Organic Superconductor κ-(BEDT-TTF)2Cu(NCS)2 under Pressure
| Title: | Antiferromagnetic Fluctuations in the Organic Superconductor κ-(BEDT-TTF)2Cu(NCS)2 under Pressure |
| Other Titles: | Antiferromagnetic Fluctuations in the Organic Superconductor kappa-(BEDT-TTF)(2)Cu(NCS)(2) under Pressure |
| Authors: | Itaya, Megumi Browse this author | | Eto, Yoshihiro Browse this author | | Kawamoto, Atsushi Browse this author | | Taniguchi, Hiromi Browse this author |
| Issue Date: | 4-Jun-2009 |
| Publisher: | American Physical Society |
| Journal Title: | Physical Review Letters |
| Volume: | 102 |
| Issue: | 22 |
| Start Page: | 227003-1 |
| End Page: | 227003-4 |
| Publisher DOI: | 10.1103/PhysRevLett.102.227003 |
| PMID: | 19658892 |
| Abstract: | We measured the C-13-NMR spectrum and T-1 of the quasi-two-dimensional organic superconductor kappa-(BEDT-TTF)(2)Cu(NCS)(2) under pressure. This material was thought to show a relationship between T-c and the effective cyclotron mass m(c)(*), obtained from the Shubnikov-de Haas (SdH) effect. We found that kappa-(BEDT-TTF)(2)Cu(NCS)(2) behaved as a Fermi liquid at low temperature under all pressures, and antiferromagnetic fluctuations were expected. The pressure dependence of the Korringa factor is similar to that of the effective cyclotron mass m(c)(*), suggesting that antiferromagnetic fluctuations contribute to the superconductivity of this material. We also found that, under pressure, T-* was shifted to 150 K, the temperature characteristic of the shift from bad metal to good metal. |
| Rights: | ©2009 American Physical Society |
| Type: | article |
| URI: | http://hdl.handle.net/2115/43041 |
| Appears in Collections: | 理学院・理学研究院 (Graduate School of Science / Faculty of Science) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)
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Submitter: 河本 充司
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