Casimir forces and high-Tc superconductors
arXiv:1906.07898 · doi:10.1103/PhysRevA.100.042504
Abstract
We investigate the Casimir forces between high- superconductors as function of the distance and temperature, focusing on optimally-doped YBaCuO. We consider formerly studied configurations in normal metals lying in the short-distance (50 nm - 600 nm), and long-distance (600 nm - 10 microns) regimes. The dielectric properties of the material are described in terms of weakly-interacting, short-correlated conducting pairs transported along quasi-2D layers. In the short-range regime, a continuous behavior of the Casimir forces arises, with no significant discontinuity at the transition temperature. This behavior also follows in the equivalent the normal conductor configuration. In the long-range regime, the forces show an abrupt increment at the critical temperature. Simultaneously, the Casimir entropy and the specific heat develop a strong discontinuous behavior, characteristic of the SC-normal phase transition. In every situation, the entropy vanishes at extremely low temperatures.
arXiv comment5 pages, 2 Figures
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