2008/04/06 by S. Graser, S. Gräser, G. R. Boyd +5 · 7 citations
Materials Science · Physics and Astronomy · #Iron-based superconductors research #Magnetic and transport properties of perovskites and related materials #Rare-earth and actinide compounds #cond-mat.supr-con
paper · pdf · doi:10.1103/physrevb.77.180514
published as Phys. Rev. B 77, 180514(R) (2008) · 5 pages, 4 figures
arxiv created 2008/04/06 · openalex publication_date 2008/05/23 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/04
Since the discovery of high-Tc LaO_1\ensuremath-xFxFeAs and other such systems based on FeAs layers, several proposals have been made for the superconducting order parameter \ensuremathΔk, on both phenomenological and microscopic grounds. Here we discuss how the symmetry of \ensuremathΔk 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 FeAs 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.