https://doi.org/10.1007/s100510050106
Symmetry breaking induced by a magnetic field in a quasi-two-dimensional d-wave superconductor
1
Laboratoire de Physique de la Matière Condensée, Département de Physique, Faculté des Sciences de
Tunis,
Campus Universitaire, 1060 Belvédère, Tunis, Tunisia
2
Laboratoire de Physique des Solidesassocié au CNRS, Bâtiment 510, Université Paris-Sud,
91405 Orsay Cedex, France
Received:
7
May
1999
Revised:
13
August
1999
Published online: 15 March 2000
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.
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
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag, 2000
