Extension of Bilbro-McMillan charge density wave-superconductivity coexistence relation to quantum regimes: Application to superconducting domes around quantum critical points

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS

卷:376

Article

Nunez-Regueiro, Manuel^1,2 

[1] Univ Grenoble Alpes, Inst Neel, F-38042 Grenoble 09, France

[2] CNRS, F-38042 Grenoble 09, France

关键词: Quantum critical point;    superconductivity;    charge density wave;   

DOI  :  10.1016/j.jmmm.2014.04.036

来源: Elsevier

【 摘 要 】

Quantum critical points (QCP) accompanied by superconductivity are ubiquitous in condensed matter physics. In general, the transition temperature T-0 of an ordered state, e.g. antiferromagnetic, goes to zero under the influence of an external parameter, e.g. pressure. Superconductivity appears before the disappearance of the ordered state, but reaches its maximum T-c when T-0 = 0. Presently, the implications of the QCP's on superconductivity,,are a. subject of debate. It is proposed here that both transition temperatures satisfy the relation (T) over tilde (2)(0) + (T) over tilde (2)(c) = 1, where the tilde indicates normalization to the maximum values. Inspired from the basic postulate of SO(N) theories of superconductors, it is proposed as an extension from Bilbro-McMillan relation. (C) 2014 Published by Elsevier By.

【 授权许可】

Free