Texture in the superconducting order parameter of CeCoIn5 revealed by nuclear magnetic resonance

K. Kakuyanagi, M. Saitoh, K. Kumagai, S. Takashima, M. Nohara, H. Takagi, Y. Matsuda

Research output: Contribution to journalArticle

163 Citations (Scopus)

Abstract

We present a 115In NMR study of the quasi-two-dimensional heavy-fermion superconductor CeCoIn5 believed to host a Fulde-Ferrel-Larkin-Ovchinnikov (FFLO) state. In the vicinity of the upper critical field and with a magnetic field applied parallel to the ab plane, the NMR spectrum exhibits a dramatic change below T*(H) which well coincides with the position of reported anomalies in specific heat and ultrasound velocity. We argue that our results provide the first microscopic evidence for the occurrence of a spatially modulated superconducting order parameter expected in a FFLO state. The NMR spectrum also implies an anomalous electronic structure of vortex cores.

Original languageEnglish
Article number047602
JournalPhysical Review Letters
Volume94
Issue number4
DOIs
Publication statusPublished - Feb 4 2005
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Fingerprint Dive into the research topics of 'Texture in the superconducting order parameter of CeCoIn<sub>5</sub> revealed by nuclear magnetic resonance'. Together they form a unique fingerprint.

  • Cite this