Publication:
Calculation of T<inf>c</inf>and the ratio 2Δ(0)/k<inf>B</inf>T<inf>c</inf>of MgB<inf>2</inf>within a two-band model of superconductivity

Issued Date

2004-01-01

Resource Type

Article

ISSN

00381098

DOI

10.1016/j.ssc.2003.09.036

Other identifier(s)

2-s2.0-0344925557

Rights

Mahidol University

Rights Holder(s)

SCOPUS

Bibliographic Citation

Solid State Communications. Vol.129, No.3 (2004), 151-156

Suggested Citation

S. Punpocha, R. Hoonsawat, I. M. Tang Calculation of T<inf>c</inf>and the ratio 2Δ(0)/k<inf>B</inf>T<inf>c</inf>of MgB<inf>2</inf>within a two-band model of superconductivity. Solid State Communications. Vol.129, No.3 (2004), 151-156. doi:10.1016/j.ssc.2003.09.036 Retrieved from: https://repository.li.mahidol.ac.th/handle/20.500.14594/21284

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Title

Calculation of T<inf>c</inf>and the ratio 2Δ(0)/k<inf>B</inf>T<inf>c</inf>of MgB<inf>2</inf>within a two-band model of superconductivity

Author(s)

S. Punpocha
 R. Hoonsawat
 I. M. Tang

Other Contributor(s)

Mahidol University

Abstract

Superconductivity in the MgB2superconductor is described within the framework of a two-band Eliashberg formalism. Different gaps are assumed to open on the different parts of the Fermi surface of this compound. Separation of the order parameter (OP) into two components is achieved by taking the Fourier transform of the OP using the momentum states of the σ- and π-bands of MgB2. Expressions for the Tcand the ratio 2Δσ(0)/kBTcfor this superconductor are obtained. Numerical values for these two properties are obtained for a range of values of the cut-off frequency of the phonons responsible for the superconductivity and for a range of values of the ratio between the two energy gaps. This was done for various values of the normalized partial densities of states on the σ-sheet of the Fermi surface. © 2003 Elsevier Ltd. All rights reserved.

Keyword(s)

Chemistry
 Materials Science
 Physics and Astronomy

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URI

https://repository.li.mahidol.ac.th/handle/20.500.14594/21284

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Scopus 2001-2005