このエントリーをはてなブックマークに追加
ID 34144
FullText URL
Author
Tsuda, S
Yokoya, T
Kiss, T
Shimojima, T
Shin, S
Togashi, T
Watanabe, S
Zhang, C
Chen, C T
Lee, S
Uchiyama, H
Tajima, S
Nakai, N
Machida, K
Abstract

"Sub-meV" resolution photoemission spectroscopy was used to study carbon-substitution dependence of the multiple superconducting gap of Mg(B1-xCx)(2). Two features corresponding to sigma and pi gaps are clearly observed in the raw spectra up to carbon concentration x=0.075. The observed x dependence of the two gaps shows a qualitatively different behavior: the sigma gap is proportional to T-c while the pi gap shows negligible change. Doping as well as temperature dependence can be explained within the two-band mean-field theory. Implications from the present study are discussed.

Keywords
magnesium diboride
single-crystals
origin
boron
Note
Digital Object Identifer:10.1103/PhysRevB.72.064527
Published with permission from the copyright holder. This is the institute's copy, as published in Physical Review B, August 2005, Volume 72, Issue 6, Pages 5.
Publisher URL:http://dx.doi.org/10.1103/PhysRevB.72.064527
Direct access to Thomson Web of Science record
Copyright © 2005 The American Physical Society. All rights reserved.
Published Date
2005-8
Publication Title
Physical Review B
Volume
volume72
Issue
issue6
Content Type
Journal Article
language
英語
Refereed
True
DOI
Web of Sience KeyUT
Submission Path
physics_general/21