Switching effects in superconductor/ferromagnet/superconductor graphene junctions

作     者：李晓薇 刘丹 鲍艳辉 Li Xiao-Wei;Liu Dan;Bao Yan-Hui;School of Physics and Electronic Electrical Engineering and Jiangsu Key Laboratory for Chemistry of Low-Dimensional Materials, Huaiyin Normal University;State Key Laboratory of Functional Materials for Informatics, (Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences);School of Physics, Northeast Normal University

作者机构：School of Physics and Electronic Electrical Engineering and Jiangsu Key Laboratory for Chemistry of Low-Dimensional Materials Huaiyin Normal University State Key Laboratory of Functional Materials for Informatics (Shanghai Institute of Microsystem and Information Technology Chinese Academy of Sciences) School of Physics Northeast Normal University 

出 版 物：《Chinese Physics B》 (中国物理B)

年 卷 期：2013年第22卷第12期

页      面：460-464页

核心收录：

学科分类：080801[工学-电机与电器] 0808[工学-电气工程] 08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学] 0704[理学-天文学] 

基　　金：Project supported by the National Natural Science Foundation of China(Grant No.11074088) 

主　　题：superconductor junction grapheme switching effect 

摘      要：The Josephson effect in the superconductor/ferromagnet/superconductor（SFS） graphene Josephson junction is studied using the Dirac Bogoliubov-de Gennes（DBdG） formalism. It is shown that the SFS graphene junction drives 0–π transition with the increasing of p=h0L/vFhˉ, which captures the effects of both the exchange field and the length of the junction; the spin-down current is dominant. The 0 state is stable for p pc, where the free energy minima are at φg= 0 and φg= π, respectively. The coexistence of the 0 and π states appears in the vicinity of pc.