Electron-phonon interaction in NbB2: a comparison with MgB2
DSpace at IIT Bombay
View Archive InfoField | Value | |
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
|
|