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Theoretical study of electronic structure and superconductivity in Nb1−xB2 alloys

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Title Theoretical study of electronic structure and superconductivity in Nb1−xB2 alloys
 
Creator JIJI THOMAS JOSEPH, P
SINGH, PRABHAKAR P
 
Subject electronic structure
alloy
superconductivity
 
Description Using the Korringa–Kohn–Rostoker coherent-potential approximation in the atomic-sphere approximation we have studied the changes in the electronic structure and the superconducting transition temperature Tc in Nb1−xB2 alloys as a function of x. We find that the variation in the electronic structure of Nb1−xB2 alloys as a function of x is consistent with the rigid-band model. However, the variation of Tc, obtained using the Allen–Dynes equation within the Gaspari–Gyorffy formalism to estimate the electron–phonon matrix elements, does not follow the expected trend. We associate this disagreement to the use of a constant ωrms in the Allen–Dynes equation over the whole range of vacancy concentration, thereby indicating the importance of lattice dynamical effects in these systems.
 
Publisher Elsevier
 
Date 2009-04-03T09:02:41Z
2011-11-25T20:30:00Z
2011-12-26T13:08:17Z
2011-12-27T05:56:18Z
2009-04-03T09:02:41Z
2011-11-25T20:30:00Z
2011-12-26T13:08:17Z
2011-12-27T05:56:18Z
2003
 
Type Article
 
Identifier Physica C: Superconductivity 391(2), 125-130
0921-4534
http://dx.doi.org/10.1016/S0921-4534(03)01091-8
http://hdl.handle.net/10054/1107
http://dspace.library.iitb.ac.in/xmlui/handle/10054/1107
 
Language en