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28 March 2024
 
  » arxiv » cond-mat/0306137

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Thermal properties of MgB2: the effect of disorder on gap amplitudes and relaxation times of p and s bands
M. Putti ; E. Galleani ; I. Pallecchi ; C. Bernini ; P. Manfrinetti ; A. Palenzona ; M. Affronte ;
Date 5 Jun 2003
Subject Superconductivity | cond-mat.supr-con
Affiliation INFM-LAMIA/CNR, INFM/LAMIA, INFM/NRC S
AbstractWe present thermal conductivity and specific heat measurements on MgB2 and Mg-AlB2 samples. Thermal properties have been analysed by using a two-gap model in order to estimate the gap amplitudes, D(0)p and D(0)s and the intra-band scattering rates, Gss and Gpp. As a function of Al doping and disorder D(0)s rapidly decreases, while D(0)p is rather constant. Gss and Gpp are increased by the disorder, being Gpp more affected than Gss.
Source arXiv, cond-mat/0306137
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