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The Tc amplification by quantum interference effects in diborides | | Annette Bussmann-Holder
; Antonio Bianconi
; | | Date: |
19 Nov 2002 | | Subject: | Superconductivity | cond-mat.supr-con | | Affiliation: | Max-Planck Institut, Stuttgart, Germany), Antonio Bianconi (Dipartimento di Fisica, Universita "La Sapienza", Roma Italy | | Abstract: | The model of two (s and p) channel superconductivity known to be necessary to explain the superconductivity in MgB2 has been applied to the Al1-xMgxB2 diborides by tuning x from MgB2 to AlMgB4. The evolution of the interband coupling parameter (probing the strength of the interchannel pairing due to quantum interference effects) and the two gaps in the s and p channel as a function of x have been calculated. While in MgB2 the quantum interference effects give an amplification of Tc by a factor of 1.5 in comparison with the dominant intra s band single channel pairing, in AlMgB4 the amplification is about 100, in comparison with the dominant intra p band single channel pairing. | | Source: | arXiv, cond-mat/0211389 | | Services: | Forum | Review | PDF | Favorites | |
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