Microscopic evidence of the FFLO state in CeCoIn5 probed by NMR

✍ Scribed by K. Kumagai; K. Kakuyanagi; M. Saitoh; S. Takashima; M. Nohara; H. Takagi; Y. Matsuda

• Publisher: Elsevier Science
• Year: 2006
• Tongue: English
• Weight: 216 KB
• Volume: 378-380
• Category: Article
• ISSN: 0921-4526
• DOI: 10.1016/j.physb.2006.01.348

✦ Synopsis

We found an anomalous temperature dependence of 115 In-NMR spectrum in the newly discovered high field and low-temperature superconducting phase of CeCoIn 5 . The anomalies near the upper limit of H c2 are attributed to spatially distributed local density of states of quasiparticles. From a simulation model with sinusoidally modulated superconducting order parameter, the present NMR study at a microscopic point of view provides a direct evidence that the Fulde-Ferrell-Larkin-Ovchinikov (FFLO) state is realized at the highfield phase in CeCoIn 5 .