Spontaneous magnetization and Hall effect in superconductors with broken time-reversal symmetry
Department of Physics, Ben-Gurion University of the Negev -
Beer-Sheva 84105, Israel
Accepted: 19 December 2001
Broken time reversal symmetry (BTRS) in d-wave superconductors is studied and is shown to yield current-carrying surface states. The corresponding spontaneous magnetization Φ is temperature independent near the critical temperature Tc for weak BTRS, in accord with recent data. For strong BTRS and thin films we expect a temperature-dependent Φ with a paramagnetic anomaly near Tc. The Hall conductance is found to vanish at zero wave vector q and finite frequency ω, however at finite q, ω it has an unusual structure.
PACS: 74.20.Rp – Pairing symmetries (other than s-wave) / 74.25.Ha – Superconductivity: Magnetic properties / 74.25.Fy – Transport properties (electric and thermal conductivity, thermoelectric effects, etc.)
© EDP Sciences, 2002