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Electron-phonon interaction in NbB2: a comparison with MgB2

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Title Electron-phonon interaction in NbB2: a comparison with MgB2
 
Creator SINGH, PRABHAKAR P
 
Subject electron-phonon interactions
density functional theory
magnesium compounds
niobium compounds
type ii superconductors
 
Description We present a comparison of electron–phonon interaction in NbB2 and MgB2, calculated using full-potential, density-functional-based methods in P6/mmm crystal structure. Our results, described in terms of (i) electronic structure, (ii) phonon density of states F(ω), (iii) Eliashberg function α2F(ω), and (iv) the solutions of the isotropic Eliashberg gap equation, clearly show significant differences in the electron–phonon interaction in NbB2 and MgB2. We find that the average electron–phonon coupling constant λ is equal to 0.59 for MgB2 and 0.43 for NbB2, leading to superconducting transition temperatures Tc at around 22 K for MgB2 and 3 K for NbB2.
 
Publisher Elsevier
 
Date 2009-04-03T09:02:14Z
2011-11-25T20:28:00Z
2011-12-26T13:08:09Z
2011-12-27T05:56:09Z
2009-04-03T09:02:14Z
2011-11-25T20:28:00Z
2011-12-26T13:08:09Z
2011-12-27T05:56:09Z
2003
 
Type Article
 
Identifier Solid State Communications 125(6), 323-326
0038-1098
http://dx.doi.org/10.1016/S0038-1098(02)00819-0
http://hdl.handle.net/10054/1103
http://dspace.library.iitb.ac.in/xmlui/handle/10054/1103
 
Language en