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Is Delta pi-gap-only superconductivity possible in Mg1-xAlxB2 and Mg(B1-yCy)(2) alloys?

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Title Is Delta pi-gap-only superconductivity possible in Mg1-xAlxB2 and Mg(B1-yCy)(2) alloys?
 
Creator JOSEPH, PJT
SINGH, PP
 
Subject t-c
magnesium diboride
first-principles
mgb2
boron
transition
origin
model
superconductivity
disorder
local-density
approximation
 
Description Using density-functional-based method, we study the k-resolved sigma- and pi-band holes in Mg1-xAlxB2 and Mg(B1-yCy)(2) alloys. We find that the calculated profiles of the loss of sigma- and pi-band holes in these two systems as a function of impurity concentration are in qualitative agreement with experiments, as expected. We also describe its implications vis-a-vis superconductivity in Mg1-xAlxB2 and Mg(B1-yCy)(2). Based on our results, a Delta(n)-gap-only superconductivity seems unlikely in Mg1-xAlxB2 alloys. (c) 2007
 
Publisher ELSEVIER SCIENCE BV
 
Date 2011-07-25T09:53:08Z
2011-12-26T12:50:37Z
2011-12-27T05:36:22Z
2011-07-25T09:53:08Z
2011-12-26T12:50:37Z
2011-12-27T05:36:22Z
2007
 
Type Article
 
Identifier PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS, 454(1-2), 43-47
0921-4534
http://dx.doi.org/10.1016/j.physc.2007.01.006
http://dspace.library.iitb.ac.in/xmlui/handle/10054/6705
http://hdl.handle.net/10054/6705
 
Language en