Analysis of field-angle dependent specific heat in unconventional superconductors: a comparison between Doppler-shift method and Kramer-Pesch approximation
We theoretically discuss the magnetic-field-angle dependence of the zero-energy density of states (ZEDOS) in superconductors. Point-node and line-node superconducting gaps on spherical and cylindrical Fermi surfaces are considered. The Doppler-shift (DS) method and the Kramer-Pesch approximation (KPA) are used to calculate the ZEDOS. Numerical results show that consequences of the DS method are corrected by the KPA.
@article{arxiv.0910.3993,
title = {Analysis of field-angle dependent specific heat in unconventional superconductors: a comparison between Doppler-shift method and Kramer-Pesch approximation},
author = {Nobuhiko Hayashi and Yuki Nagai and Yoichi Higashi},
journal= {arXiv preprint arXiv:0910.3993},
year = {2009}
}
Comments
2 pages, 4 figures; To be published in Proc. of M2S-IX 2009, Tokyo (Physica C)