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Symmetry breaking induced by a magnetic field in a quasi-two-dimensional d-wave superconductor |
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| Authors: | A. Ben Ali M. Héritier S. Charfi-Kaddour R. Bennaceur |
| Affiliation: | (1) Laboratoire de Physique de la Matière Condensée, Département de Physique, Faculté des Sciences de Tunis, Campus Universitaire, 1060 Belvédère, Tunis, Tunisia, TN;(2) Laboratoire de Physique des Solides (associé au CNRS), Batiment 510, Université Paris-Sud, 91405 Orsay Cedex, France, FR |
| Abstract: | A model of quasi-two-dimensional d-wave superconductor, with strong nesting properties of the Fermi surface is considered. The orbital effect of a moderate magnetic field applied perpendicularly to the conducting planes is studied in the mean field approximation. It is shown that the field can induce a time reversal symmetry breaking SDW order coexisting with the superconducting order and can open a gap over the whole Fermi surface. The anomalies recently observed in the heat conductivity in might be ascribed to this effect. Received 7 May 1999 and Received in final form 13 August 1999 |
| Keywords: | PACS. 74.20.Mn Nonconventional mechanisms (spin fluctuations polarons and bipolarons resonating valence bond model anyon mechanism marginal Fermi liquid Luttinger liquid etc.) - 75.30.Fv Spin-density waves - 74.72.Hs Bi-based cuprates |
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