|VOLUME 96 (2012) | ISSUE 3 |
Non-analytical angular dependence of the upper critical magnetic field in a quasi-one-dimensional superconductor
A. G. Lebed+*, O. Sepper+
+Department of Physics, University of Arizona, AZ 85721 Tucson, USA
*Landau Institute for Theoretical Physics, 117334 Moscow, Russia
We have derived the so-called gap equation, which determines the upper
critical magnetic field, perpendicular to conducting chains of a
By analyzing this equation at low temperatures, we have found that the
calculated angular dependence of the upper critical magnetic field is
qualitatively different than that in the so-called effective mass model.
In particular, our theory predicts a non-analytical angular dependence of
the upper critical magnetic field, ,
when magnetic field is close to some special crystallographic axis and makes
an angle α with it.
We discuss possible experiments on the superconductor (DMET)2I3
to discover this non-analytical dependence.