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

doi:10.1016/S0022-3697(02)00236-6

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 journal › Conference article › peer-review

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 T_c 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 language	English
Pages (from-to)	2141-2144
Number of pages	4
Journal	Journal of Physics and Chemistry of Solids
Volume	63
Issue number	12
DOIs	https://doi.org/10.1016/S0022-3697(02)00236-6
Publication status	Published - Dec 2002
Externally published	Yes
Event	SNS 2001 - Chicago, IL, United States Duration: May 13 2001 → May 17 2002

Keywords

A. Intermetallic compounds
D. Electronic structure

ASJC Scopus subject areas

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

Access to Document

10.1016/S0022-3697(02)00236-6

Cite this

@article{e9ab44073f0a4ce986b9b8867212627d,

title = "Photoemission results of intermetallic superconductors: Nb3Al and MgB2",

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.",

keywords = "A. Intermetallic compounds, D. Electronic structure",

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

note = "Funding Information: This work was supported by a Grant-in-Aid for Scientific Research from the Ministry of Education, Science, Culture and Sports of Japan. T.K thanks the JSPS for financial help.; SNS 2001 ; Conference date: 13-05-2001 Through 17-05-2002",

year = "2002",

month = dec,

doi = "10.1016/S0022-3697(02)00236-6",

language = "English",

volume = "63",

pages = "2141--2144",

journal = "Journal of Physics and Chemistry of Solids",

issn = "0022-3697",

publisher = "Elsevier Limited",

number = "12",

}

TY - JOUR

T1 - Photoemission results of intermetallic superconductors

T2 - SNS 2001

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.

N1 - Funding Information: This work was supported by a Grant-in-Aid for Scientific Research from the Ministry of Education, Science, Culture and Sports of Japan. T.K thanks the JSPS for financial help.

PY - 2002/12

Y1 - 2002/12

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.

KW - A. Intermetallic compounds

KW - D. Electronic structure

UR - http://www.scopus.com/inward/record.url?scp=0036901244&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0036901244&partnerID=8YFLogxK

U2 - 10.1016/S0022-3697(02)00236-6

DO - 10.1016/S0022-3697(02)00236-6

M3 - Conference article

AN - SCOPUS:0036901244

SN - 0022-3697

VL - 63

SP - 2141

EP - 2144

JO - Journal of Physics and Chemistry of Solids

JF - Journal of Physics and Chemistry of Solids

IS - 12

Y2 - 13 May 2001 through 17 May 2002

ER -