Thermal properties of MgB2: the effect of disorder on gap amplitudes and relaxation times of $\pi$ and $\sigma$ bands

We 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 disorde...

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Detalles Bibliográficos
Autores principales: Putti, M, Galleani, E, Pallecchi, I, Bernini, C, Manfrinetti, P, Palenzona, A, Affronte, M
Lenguaje:eng
Publicado: 2003
Materias:
Condensed Matter
Acceso en línea:http://cds.cern.ch/record/620271
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author Putti, M
Galleani, E
Pallecchi, I
Bernini, C
Manfrinetti, P
Palenzona, A
Affronte, M
author_facet Putti, M
Galleani, E
Pallecchi, I
Bernini, C
Manfrinetti, P
Palenzona, A
Affronte, M
author_sort Putti, M
collection CERN
description We 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.
id cern-620271
institution Organización Europea para la Investigación Nuclear
language eng
publishDate 2003
record_format invenio
spelling cern-6202712019-09-30T06:29:59Zhttp://cds.cern.ch/record/620271engPutti, MGalleani, EPallecchi, IBernini, CManfrinetti, PPalenzona, AAffronte, MThermal properties of MgB2: the effect of disorder on gap amplitudes and relaxation times of $\pi$ and $\sigma$ bandsCondensed MatterWe 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.cond-mat/0306137oai:cds.cern.ch:6202712003-06-05
spellingShingle Condensed Matter
Putti, M
Galleani, E
Pallecchi, I
Bernini, C
Manfrinetti, P
Palenzona, A
Affronte, M
Thermal properties of MgB2: the effect of disorder on gap amplitudes and relaxation times of $\pi$ and $\sigma$ bands
title Thermal properties of MgB2: the effect of disorder on gap amplitudes and relaxation times of $\pi$ and $\sigma$ bands
title_full Thermal properties of MgB2: the effect of disorder on gap amplitudes and relaxation times of $\pi$ and $\sigma$ bands
title_fullStr Thermal properties of MgB2: the effect of disorder on gap amplitudes and relaxation times of $\pi$ and $\sigma$ bands
title_full_unstemmed Thermal properties of MgB2: the effect of disorder on gap amplitudes and relaxation times of $\pi$ and $\sigma$ bands
title_short Thermal properties of MgB2: the effect of disorder on gap amplitudes and relaxation times of $\pi$ and $\sigma$ bands
title_sort thermal properties of mgb2: the effect of disorder on gap amplitudes and relaxation times of $\pi$ and $\sigma$ bands
topic Condensed Matter
url http://cds.cern.ch/record/620271
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