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28 March 2024
 
  » arxiv » cond-mat/0310461

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Critical Field of MGB2 : Crossover from Clean to Dirty Regimes
M.Putti ; V.Braccini ; C.Ferdeghini ; I.Pallecchi ; A.S.Siri ; F.Gatti ; P.Manfrinetti ; A.Palenzona ;
Date 20 Oct 2003
Journal Physical Review B 71, 104519 (2005)
Subject Superconductivity | cond-mat.supr-con
AbstractWe have studied the upper critical field, Bc2, in poly-crystalline MgB2 samples in which disorder was varied in a controlled way to carry selectively p and s bands from clean to dirty limit. We have found that the clean regime survives when p bands are dirty and s bands are midway between clean and dirty. In this framework we can explain the anomalous behaviour of Al doped samples, in which Bc2 decreases as doping increases.
Source arXiv, cond-mat/0310461
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