Consideration of Exciton Models to Explain Superconductivity Transition above 150 K in HgBa2Ca2Cu3O8+δ at Ultra-High Pressure
Abstract
It has been recently reported that the shoulder of the superconducting transition in HgBa2Ca2Cu3O8+δ can be elevated from ca. 133 K to ca. 153 K as pressure (P) is raised from 1 atm (ca. 105 Pa) to 150 kbar (1.5 × 1010 Pa). The data show an approximately linear Tc against P up to ca. 17 kbar (1.7 × 109 Pa) (hydrostatic), and thereafter (non-hydrostatic) indication of saturation or slope change. It is the purpose of this paper to discuss this pressure enhancement in terms of two general theories of exciton-induced high-Tc superconductivity, namely the viewpoint of the virtual exciton and that of the condensation of excitons.
- Publication:
-
Proceedings of the Royal Society of London Series A
- Pub Date:
- July 1994
- DOI:
- 10.1098/rspa.1994.0100
- Bibcode:
- 1994RSPSA.446..213V