Doping dependence of Meissner effect in triangular-lattice superconductors
Abstract
In the spin-excitation-mediated pairing mechanism for superconductivity, the geometric frustration effects not only the spin configuration but also the superconducting-state properties. Within the framework of the kinetic-energy-driven superconducting mechanism, the doping and temperature dependence of the Meissner effect in triangular-lattice superconductors is investigated. It is shown that the magnetic-field-penetration depth exhibits an exponential temperature dependence due to the absence of the d-wave gap nodes at the Fermi surface. However, in analogy to the dome-like shape of the doping dependence of the superconducting transition temperature, the superfluid density increases with increasing doping in the lower doped regime, and reaches a maximum around the critical doping, then decreases in the higher doped regime.
Cite
@article{arxiv.1506.05194,
title = {Doping dependence of Meissner effect in triangular-lattice superconductors},
author = {Ling Qin and Xixiao Ma and Lulin Kuang and Jihong Qin and Shiping Feng},
journal= {arXiv preprint arXiv:1506.05194},
year = {2015}
}
Comments
13 pages, 7 figures. Added figure, references, and discussions. Accepted for publication in Journal of Low Temperature Physics. arXiv admin note: text overlap with arXiv:1501.02420