A two band model for superconductivity: probing interband pair formation

dc.creator	Lagos R. E.
dc.creator	Cabrera G. G.
dc.date	2003
dc.date.accessioned	2013-06-01T10:48:38Z
dc.date.available	2013-06-01T10:48:38Z
dc.date.issued	2013-06-01
dc.identifier	http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-97332003000400015
dc.identifier	http://www.doaj.org/doaj?func=openurl&genre=article&issn=01039733&date=2003&volume=33&issue=4&spage=713
dc.identifier.uri	http://koha.mediu.edu.my:8181/jspui/handle/123456789/8309
dc.description	We propose a two band model for superconductivity. It turns out that the simplest nontrivial case considers solely interband scattering, and both bands can be modeled as symmetric (around the Fermi level) and flat, thus each band is completely characterized by its half-band width Wn (n=1,2). A useful dimensionless parameter is d, proportional to W2 - W1. The case delta = 0 retrieves the conventional BCS model. We probe the specific heat, the ratio gap over critical temperature, the thermodynamic critical field and tunneling conductance as functions of d and temperature (from zero to Tc). We compare our results with experimental results for MgB2 and good quantitative agreement is obtained, indicating the relevance of interband coupling. Work in progress also considers the inclusion of band hybridization and general interband as well as intra-band scattering mechanisms.
dc.publisher	Sociedade Brasileira de Física
dc.source	Brazilian Journal of Physics
dc.title	A two band model for superconductivity: probing interband pair formation

الملفات في هذه المادة

الملفات	الحجم	الصيغة	عرض
لا توجد أي ملفات مرتبطة بهذه المادة.