BCS theory for s+g-wave superconductivity borocarbides Y(Lu)Ni$_2$B$_2$C
Superconductivity
2009-11-10 v1
Abstract
The s+g mixed gap function \Delta_k=\Delta {[(1-x)-x\sin^4\theta\cos4\phi]} (x: weight of g-wave component) has been studied within BCS theory. By suitable consideration of the pairing interaction, we have confirmed that the coexistence of s- and g-wave, as well as the state with equal s and g amplitudes (i.e., x=1/2) may be stable. This provides the semi-phenomenological theory for the s+g-wave superconductivity with point nodes which has been observed experimentally in borocarbides YNi_2B_2C and possibly in LuNi_2B_2C.
Keywords
Cite
@article{arxiv.cond-mat/0301290,
title = {BCS theory for s+g-wave superconductivity borocarbides Y(Lu)Ni$_2$B$_2$C},
author = {Qingshan Yuan and Peter Thalmeier},
journal= {arXiv preprint arXiv:cond-mat/0301290},
year = {2009}
}
Comments
5 pages, 3 figures