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Theoretical study of electron-phonon interaction in ZrB2 and TaB2

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Title Theoretical study of electron-phonon interaction in ZrB2 and TaB2
 
Creator SINGH, PP
 
Subject linear-response theory
diborides
 
Description Using full-potential, density-functional-based methods we have studied electron-phonon interaction in ZrB2 and TaB2 in P6/mmm crystal structure. Our results for phonon density of states and Eliashberg function show that the electron-phonon coupling in ZrB2 is much weaker than in TaB2. In particular, we find that the average electron-phonon coupling constant lambda is equal to 0.15 for ZrB2 and 0.73 for TaB2. The solutions of the isotropic Eliashberg gap equation indicate no superconductivity for ZrB2 but a superconducting transition temperature T-c of around 12 K for TaB2 with mu*similar to0.16.
 
Publisher AMERICAN PHYSICAL SOC
 
Date 2011-07-17T21:58:45Z
2011-12-26T12:50:30Z
2011-12-27T05:35:40Z
2011-07-17T21:58:45Z
2011-12-26T12:50:30Z
2011-12-27T05:35:40Z
2004
 
Type Article
 
Identifier PHYSICAL REVIEW B, 69(9), -
1098-0121
http://dx.doi.org/10.1103/PhysRevB.69.094519
http://dspace.library.iitb.ac.in/xmlui/handle/10054/4849
http://hdl.handle.net/10054/4849
 
Language en