Microscopic evidence of the FFLO state in CeCoIn5 probed by NMR

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

doi:10.1016/j.physb.2006.01.348

Microscopic evidence of the FFLO state in CeCoIn₅ probed by NMR

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

Research output: Contribution to journal › Article › peer-review

1 Citation (Scopus)

Abstract

We found an anomalous temperature dependence of ¹¹⁵In-NMR spectrum in the newly discovered high field and low-temperature superconducting phase of CeCoIn₅. The anomalies near the upper limit of H_{c 2} 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 high-field phase in CeCoIn₅.

Original language	English
Pages (from-to)	347-350
Number of pages	4
Journal	Physica B: Condensed Matter
Volume	378-380
Issue number	SPEC. ISS.
DOIs	https://doi.org/10.1016/j.physb.2006.01.348
Publication status	Published - May 1 2006
Externally published	Yes

Keywords

CeCoIn
FFLO
Heavy fermion compound
NMR
Superconductivity

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Electrical and Electronic Engineering

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title = "Microscopic evidence of the FFLO state in CeCoIn5 probed by NMR",

abstract = "We found an anomalous temperature dependence of 115In-NMR spectrum in the newly discovered high field and low-temperature superconducting phase of CeCoIn5. The anomalies near the upper limit of Hc 2 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 high-field phase in CeCoIn5.",

keywords = "CeCoIn, FFLO, Heavy fermion compound, NMR, Superconductivity",

author = "K. Kumagai and K. Kakuyanagi and M. Saitoh and S. Takashima and M. Nohara and H. Takagi and Y. Matsuda",

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T1 - Microscopic evidence of the FFLO state in CeCoIn5 probed by NMR

AU - Kumagai, K.

AU - Kakuyanagi, K.

AU - Saitoh, M.

AU - Takashima, S.

AU - Nohara, M.

AU - Takagi, H.

AU - Matsuda, Y.

PY - 2006/5/1

Y1 - 2006/5/1

N2 - We found an anomalous temperature dependence of 115In-NMR spectrum in the newly discovered high field and low-temperature superconducting phase of CeCoIn5. The anomalies near the upper limit of Hc 2 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 high-field phase in CeCoIn5.

AB - We found an anomalous temperature dependence of 115In-NMR spectrum in the newly discovered high field and low-temperature superconducting phase of CeCoIn5. The anomalies near the upper limit of Hc 2 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 high-field phase in CeCoIn5.

KW - CeCoIn

KW - FFLO

KW - Heavy fermion compound

KW - NMR

KW - Superconductivity

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