Photoemission results of intermetallic superconductors: Nb3Al and MgB2

T. Yokoya, S. Tsuda, A. Chainani, T. Kiss, K. Hirata, Y. Takano, K. Togano, H. Kito, H. Ihara, S. Shin

Research output: Contribution to journalConference article

2 Citations (Scopus)

Abstract

We study the superconducting electronic structures of Nb3Al and MgB2 using high-resolution spectroscopy. The obtained spectrum of Nb3Al measured below Tc shows clear opening of the superconducting gap with a sharp pile up in the density of states and a shift of the leading edge. In addition, the spectrum shows a peak-dip-hump line shape expected from the strong-coupling theory. On the other hand, for MgB2, the superconducting-state spectrum measured at 5.4K shows a coherent peak with a shoulder structure, in sharp contrast to that expected from a single isotropic gap. The superconducting spectral shape of MgB2 can be explained in terms of a multicomponent gap.

Original languageEnglish
Pages (from-to)2141-2144
Number of pages4
JournalJournal of Physics and Chemistry of Solids
Volume63
Issue number12
DOIs
Publication statusPublished - 2002 Dec 1
EventSNS 2001 - Chicago, IL, United States
Duration: 2001 May 132002 May 17

Fingerprint

Photoemission
Superconducting materials
Intermetallics
Piles
Electronic structure
intermetallics
photoelectric emission
Spectroscopy
piles
leading edges
shoulders
line shape
electronic structure
shift
high resolution
spectroscopy

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics

Cite this

Yokoya, T. ; Tsuda, S. ; Chainani, A. ; Kiss, T. ; Hirata, K. ; Takano, Y. ; Togano, K. ; Kito, H. ; Ihara, H. ; Shin, S. / Photoemission results of intermetallic superconductors : Nb3Al and MgB2. In: Journal of Physics and Chemistry of Solids. 2002 ; Vol. 63, No. 12. pp. 2141-2144.
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abstract = "We study the superconducting electronic structures of Nb3Al and MgB2 using high-resolution spectroscopy. The obtained spectrum of Nb3Al measured below Tc shows clear opening of the superconducting gap with a sharp pile up in the density of states and a shift of the leading edge. In addition, the spectrum shows a peak-dip-hump line shape expected from the strong-coupling theory. On the other hand, for MgB2, the superconducting-state spectrum measured at 5.4K shows a coherent peak with a shoulder structure, in sharp contrast to that expected from a single isotropic gap. The superconducting spectral shape of MgB2 can be explained in terms of a multicomponent gap.",
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Yokoya, T, Tsuda, S, Chainani, A, Kiss, T, Hirata, K, Takano, Y, Togano, K, Kito, H, Ihara, H & Shin, S 2002, 'Photoemission results of intermetallic superconductors: Nb3Al and MgB2', Journal of Physics and Chemistry of Solids, vol. 63, no. 12, pp. 2141-2144. https://doi.org/10.1016/S0022-3697(02)00236-6

Photoemission results of intermetallic superconductors : Nb3Al and MgB2. / Yokoya, T.; Tsuda, S.; Chainani, A.; Kiss, T.; Hirata, K.; Takano, Y.; Togano, K.; Kito, H.; Ihara, H.; Shin, S.

In: Journal of Physics and Chemistry of Solids, Vol. 63, No. 12, 01.12.2002, p. 2141-2144.

Research output: Contribution to journalConference article

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T1 - Photoemission results of intermetallic superconductors

T2 - Nb3Al and MgB2

AU - Yokoya, T.

AU - Tsuda, S.

AU - Chainani, A.

AU - Kiss, T.

AU - Hirata, K.

AU - Takano, Y.

AU - Togano, K.

AU - Kito, H.

AU - Ihara, H.

AU - Shin, S.

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N2 - We study the superconducting electronic structures of Nb3Al and MgB2 using high-resolution spectroscopy. The obtained spectrum of Nb3Al measured below Tc shows clear opening of the superconducting gap with a sharp pile up in the density of states and a shift of the leading edge. In addition, the spectrum shows a peak-dip-hump line shape expected from the strong-coupling theory. On the other hand, for MgB2, the superconducting-state spectrum measured at 5.4K shows a coherent peak with a shoulder structure, in sharp contrast to that expected from a single isotropic gap. The superconducting spectral shape of MgB2 can be explained in terms of a multicomponent gap.

AB - We study the superconducting electronic structures of Nb3Al and MgB2 using high-resolution spectroscopy. The obtained spectrum of Nb3Al measured below Tc shows clear opening of the superconducting gap with a sharp pile up in the density of states and a shift of the leading edge. In addition, the spectrum shows a peak-dip-hump line shape expected from the strong-coupling theory. On the other hand, for MgB2, the superconducting-state spectrum measured at 5.4K shows a coherent peak with a shoulder structure, in sharp contrast to that expected from a single isotropic gap. The superconducting spectral shape of MgB2 can be explained in terms of a multicomponent gap.

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