Please use this identifier to cite or link to this item: https://ir.swu.ac.th/jspui/handle/123456789/15285
ชื่อเรื่อง: Dependence of the gap-ratio on the Fermi level shift in a Van Hove superconductor
ผู้แต่ง: Kaskamalas S.
Krunavakarn B.
Yoksan S.
Keywords: calculation
conductor
conference paper
high temperature
temperature dependence
theory
วันที่เผยแพร่: 2000
บทคัดย่อ: To understand the origin of high temperature superconductivity model based on the close proximity of the Fermi level to a quasi-two-dimensional Van Hove Singularity (VHS) in the density of states has been suggested. Here we present our study of the dependence of the zero temperature gap to the critical temperature for s- and d-wave superconductors on the Fermi level shift (δ) from the VHS within the BCS theory. Exact numerical calculations for the s and d gap ratios are carried out and approximate analytic expressions for the ratio are given. We find that the maximum gap ratio occurs at δ = 0, and it decreases symmetrically with increasing δ.
URI: https://ir.swu.ac.th/jspui/handle/123456789/15285
https://www.scopus.com/inward/record.uri?eid=2-s2.0-0034632455&doi=10.1142%2fs0217979200002387&partnerID=40&md5=4e9007b7d556e2ab04b2741b816ddbc9
ISSN: 2179792
Appears in Collections:Scopus 1983-2021

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