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Fulde-Ferrell-Larkin-Ovchinnikov State in a Perpendicular Field of Quasi-Two-Dimensional CeCoIn5
| Title: | Fulde-Ferrell-Larkin-Ovchinnikov State in a Perpendicular Field of Quasi-Two-Dimensional CeCoIn5 |
| Authors: | Kumagai, K. Browse this author | | Saitoh, M. Browse this author | | Oyaizu, T. Browse this author | | Furukawa, Y. Browse this author | | Takashima, S. Browse this author | | Nohara, M. Browse this author | | Takagi, H. Browse this author | | Matsuda, Y. Browse this author |
| Issue Date: | 2006 |
| Publisher: | American Physical Society |
| Journal Title: | Physical Review Letters |
| Volume: | 97 |
| Issue: | 22 |
| Start Page: | 227002 |
| Publisher DOI: | 10.1103/PhysRevLett.97.227002 |
| PMID: | 17155832 |
| Abstract: | A Fulde-Ferrell-Larkin-Ovchinnkov (FFLO) state was previously reported in the quasi-2D heavy fermion CeCoIn5 when a magnetic field was applied parallel to the ab plane. Here, we conduct 115In NMR studies of this material in a perpendicular field, and provide strong evidence for FFLO in this case as well. Although the topology of the phase transition lines in the H-T phase diagram is identical for both configurations, there are several remarkable differences between them. Compared to H k ab, the FFLO phase for H ⊥ ab is confined in a much narrower region at the low-T–high-H corner in the H-T plane, and the critical field separating the FFLO and non-FFLO superconducting states almost ceases to have a temperature dependence. Moreover, directing H ⊥ ab results in a notable change in the quasiparticle excitation spectrum within the planar node associated with the FFLO transition. |
| Rights: | Copyright © 2006 American Physical Society |
| Relation: | http://www.aps.org/ |
| Type: | article |
| URI: | http://hdl.handle.net/2115/17116 |
| 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: 熊谷 健一
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