Theoretical study of electronic structure and superconductivity in Nb1−xB2 alloys
DSpace at IIT Bombay
View Archive InfoField | Value | |
Title |
Theoretical study of electronic structure and superconductivity in Nb1−xB2 alloys
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Creator |
JIJI THOMAS JOSEPH, P
SINGH, PRABHAKAR P |
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Subject |
electronic structure
alloy superconductivity |
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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.
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Publisher |
Elsevier
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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 |
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Type |
Article
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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 |
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Language |
en
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