Thermodynamic properties in triangular-lattice superconductors
Abstract
The study of superconductivity arising from doping a Mott insulator has become a central issue in the area of superconductivity. Within the framework of the kinetic-energy-driven superconducting mechanism, we discuss the thermodynamic properties in triangular-lattice superconductors. It is shown that a sharp peak in the specific-heat appears at the superconducting transition temperature Tc, and then the specific-heat varies exponentially as a function of temperature for the temperatures T<Tc due to the absence of the d-wave gap nodes at the charge-carrier Fermi surface. In particular, the upper critical field follows qualitatively the charge-carrier pair gap type temperature dependence, and has the same dome-shaped doping dependence as Tc.
Cite
@article{arxiv.1511.00842,
title = {Thermodynamic properties in triangular-lattice superconductors},
author = {Xixiao Ma and Ling Qin and Huaisong Zhao and Yu Lan and Shiping Feng},
journal= {arXiv preprint arXiv:1511.00842},
year = {2016}
}
Comments
7 pages, 6 figures, added discussions and references, accepted for publication in Journal of Low Temperature Physics