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2004 | 106 | 5 | 603-608
Article title

Upper Critical Field for Cobalt Oxide Superconductors

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EN
Abstracts
EN
Motivated by the recent discovery of the cobalt oxide superconductors, we calculate the temperature dependence of the upper critical field on a triangular lattice. Using the lattice version of the Gor'kov equations we investigate how the applied magnetic field affects singlet and triplet types of superconductivity. We show that in a wide range of model parameters not only Zeeman coupling, but also the diamagnetic pair breaking mechanism favors the triplet pairing. In the cobalt oxide superconductors the symmetry of the order parameter remains an open problem and both singlet and triplet superconductivity should be taken into account. We show that in such a case, an external magnetic field may induce a transition from singlet to triplet superconductivity. We discuss experimental results which may confirm this tempting hypothesis.
Keywords
EN
Publisher

Year
Volume
106
Issue
5
Pages
603-608
Physical description
Dates
published
2004-11
received
2004-06-06
Contributors
  • Department of Theoretical Physics, Institute of Physics, Silesian University, Uniwersytecka 4, 40-007 Katowice, Poland
author
  • Department of Theoretical Physics, Institute of Physics, Silesian University, Uniwersytecka 4, 40-007 Katowice, Poland
  • Institute of Molecular Physics, Smoluchowskiego 17, 60-179 Poznań, Poland
References
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Document Type
Publication order reference
Identifiers
YADDA identifier
bwmeta1.element.bwnjournal-article-appv106n507kz
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