Abstract
Since the discovery of high- and other such systems based on layers, several proposals have been made for the superconducting order parameter , on both phenomenological and microscopic grounds. Here we discuss how the symmetry of in the bulk can be determined, assuming that single crystals will soon be available. We suggest that a measurement of the dependence of the low-temperature specific heat on the angle of a magnetic field in the plane is the simplest such method, and calculate representative specific heat vs field angle oscillations for the various candidate states, using a phenomenological band structure fitted to the density functional theory Fermi surface.
- Received 5 April 2008
DOI:https://doi.org/10.1103/PhysRevB.77.180514
©2008 American Physical Society