Photoemission spectroscopic evidence of gap anisotropy in an f-electron superconductor

T. Kiss, F. Kanetaka, Takayoshi Yokoya, T. Shimojima, K. Kanai, S. Shin, Y. Onuki, T. Togashi, C. Zhang, C. T. Chen, S. Watanabe

Research output: Contribution to journalArticle

161 Citations (Scopus)

Abstract

We used low-temperature ultrahigh-resolution (360 μeV) photoemission spectroscopy with a laser as a photon source (Laser-PES) to study the superconducting (SC) gap of an f-electron superconductor CeRu2. The unique combination of the large escape depth expected from the known universal behavior and extremely high-energy resolution has enabled us to directly measure the bulk SC gap of an f-electron superconductor for the first time. The present study provides direct evidence for an anisotropic SC gap in C eRu2, and also demonstrates the potential of Laser-PES in investigating unconventional superconductivity realized in correlated d- and f-electron superconductors.

Original languageEnglish
Article number057001
JournalPhysical Review Letters
Volume94
Issue number5
DOIs
Publication statusPublished - Feb 11 2005
Externally publishedYes

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photoelectric emission
anisotropy
lasers
electrons
escape
superconductivity
photons
spectroscopy
energy

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Photoemission spectroscopic evidence of gap anisotropy in an f-electron superconductor. / Kiss, T.; Kanetaka, F.; Yokoya, Takayoshi; Shimojima, T.; Kanai, K.; Shin, S.; Onuki, Y.; Togashi, T.; Zhang, C.; Chen, C. T.; Watanabe, S.

In: Physical Review Letters, Vol. 94, No. 5, 057001, 11.02.2005.

Research output: Contribution to journalArticle

Kiss, T, Kanetaka, F, Yokoya, T, Shimojima, T, Kanai, K, Shin, S, Onuki, Y, Togashi, T, Zhang, C, Chen, CT & Watanabe, S 2005, 'Photoemission spectroscopic evidence of gap anisotropy in an f-electron superconductor', Physical Review Letters, vol. 94, no. 5, 057001. https://doi.org/10.1103/PhysRevLett.94.057001
Kiss, T. ; Kanetaka, F. ; Yokoya, Takayoshi ; Shimojima, T. ; Kanai, K. ; Shin, S. ; Onuki, Y. ; Togashi, T. ; Zhang, C. ; Chen, C. T. ; Watanabe, S. / Photoemission spectroscopic evidence of gap anisotropy in an f-electron superconductor. In: Physical Review Letters. 2005 ; Vol. 94, No. 5.
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AU - Shin, S.

AU - Onuki, Y.

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AU - Watanabe, S.

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