Phase transition to the Fulde_Ferrell_Larkin_Ovchinnikov state in a quasi-one-dimensional organic superconductor with anion order

18th International Conference on Recent Progress in Many-Body Theories

Miyawaki, Nobumi^1 ; Shimahara, Hiroshi^2

Graduate School of Integrated Arts and Sciences, Hiroshima University, Kagamiyama 1-7-1, Higashi-Hiroshima

739-8521, Japan^1

Department of Quantum Matter Science, ADSM, Hiroshima University, Kagamiyama 1-3-1, Higashi-Hiroshima

739-8530, Japan^2

关键词: Dimensional crossover;    Fulde-Ferrell-Larkin-Ovchinnikov state;    Larkin-Ovchinnikov;    Organic superconductor;    Quasi-one dimensional;    Superconducting state;    Temperature dependence;    Upper critical fields;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/702/1/012002/pdf
DOI  :  10.1088/1742-6596/702/1/012002

来源: IOP

【 摘 要 】

A theoretical study is presented on the effect of anion order on the phase transition from the normal state to a Fulde-Ferrell-Larkin -Ovchinnikov superconducting state in a quasi-one-dimensional organic superconductor (TMTSF)2ClO4. The temperature dependence of the upper critical field Hc2(T) is examined. In the absence of anion order, the Hc2(T) curve exhibits a one- to two-dimensional crossover with decreasing temperature T. For a sufficiently large anion order parameter, the dimensional crossover disappears and then a kink appears in the Hc2(T) curve.