Fulde-Ferrell-Larkin-Ovchinnikov state in a perpendicular field of quasi-two-dimensional CeCoIn5

K. Kumagai, M. Saitoh, T. Oyaizu, Y. Furukawa, S. Takashima, Minoru Nohara, H. Takagi, Y. Matsuda

Research output: Contribution to journalArticle

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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 In115 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 Hâ¥ab, the FFLO phase for Hâ¥ab is confined in a much narrower region at the low-Tâ€"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 Hâ¥ab results in a notable change in the quasiparticle excitation spectrum within the planar node associated with the FFLO transition.

Original languageEnglish
Article number227002
JournalPhysical Review Letters
Volume97
Issue number22
DOIs
Publication statusPublished - 2006
Externally publishedYes

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topology
fermions
phase diagrams
temperature dependence
nuclear magnetic resonance
configurations
magnetic fields
excitation

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Fulde-Ferrell-Larkin-Ovchinnikov state in a perpendicular field of quasi-two-dimensional CeCoIn5. / Kumagai, K.; Saitoh, M.; Oyaizu, T.; Furukawa, Y.; Takashima, S.; Nohara, Minoru; Takagi, H.; Matsuda, Y.

In: Physical Review Letters, Vol. 97, No. 22, 227002, 2006.

Research output: Contribution to journalArticle

Kumagai, K, Saitoh, M, Oyaizu, T, Furukawa, Y, Takashima, S, Nohara, M, Takagi, H & Matsuda, Y 2006, 'Fulde-Ferrell-Larkin-Ovchinnikov state in a perpendicular field of quasi-two-dimensional CeCoIn5', Physical Review Letters, vol. 97, no. 22, 227002. https://doi.org/10.1103/PhysRevLett.97.227002
Kumagai, K. ; Saitoh, M. ; Oyaizu, T. ; Furukawa, Y. ; Takashima, S. ; Nohara, Minoru ; Takagi, H. ; Matsuda, Y. / Fulde-Ferrell-Larkin-Ovchinnikov state in a perpendicular field of quasi-two-dimensional CeCoIn5. In: Physical Review Letters. 2006 ; Vol. 97, No. 22.
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AU - Oyaizu, T.

AU - Furukawa, Y.

AU - Takashima, S.

AU - Nohara, Minoru

AU - Takagi, H.

AU - Matsuda, Y.

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