Casimir forces and high-Tc superconductors
| Autor: | Santiago F. Caballero-Benitez, Carlos Villarreal |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
Superconductivity
Physics Phase transition Condensed Matter - Mesoscale and Nanoscale Physics Specific heat Condensed matter physics Condensed Matter - Superconductivity Transition temperature Doping FOS: Physical sciences Dielectric 01 natural sciences 010305 fluids & plasmas Conductor Casimir effect Superconductivity (cond-mat.supr-con) 0103 physical sciences Mesoscale and Nanoscale Physics (cond-mat.mes-hall) 010306 general physics |
| DOI: | 10.48550/arxiv.1906.07898 |
| Popis: | We investigate the Casimir forces between high-$T_c$ superconductors as function of the distance and temperature, focusing on optimally-doped YBa$_2$Cu$_3$O$_{6.95}$. 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. Comment: 5 pages, 2 Figures |
| Databáze: | OpenAIRE |
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