Impurity scattering effects on the low-temperature specific heat of d-wave superconductors
Superconductivity
2009-10-31 v1 Disordered Systems and Neural Networks
Abstract
Very recently impurity scattering effects on quasiparticles in d-wave superconductors have attracted much attention. Especially, the thermodynamic properties in magnetic fields H are of interest. We have measured the low-temperature specific heat C(T,H) of La_1.78Sr_0.22Cu_1-xNi_xO4. For the first time, the impurity scattering effects on C(T,H) of cuprate superconductors were clearly observed, and are compared with theory of d-wave superconductivity. It is found that impurity scattering leads to gamma(H)=gamma(0)(1+D((H/H_c2)(ln(H_c2/H)) in small magnetic fields. Most amazingly, the scaling of C(T,H) breaks down due to impurity scattering.
Keywords
Cite
@article{arxiv.cond-mat/0004109,
title = {Impurity scattering effects on the low-temperature specific heat of d-wave superconductors},
author = {C. F. Chang and J. -Y. Lin and H. D. Yang},
journal= {arXiv preprint arXiv:cond-mat/0004109},
year = {2009}
}
Comments
Physical review B, in press