Tunneling conductance in graphene ferromagnet/p wave superconductor junctions  

作　　者：LI XiaoWei CHEN HuaBao LIU ShuJing 

机构地区：[1]School of Physics and Electronic Electrical Engineering,Huaiyin Normal University,Huaian 223300,China [2]State Key Laboratory of Functional Materials for Informatics,Shanghai Institute of Microsystem and Information Technology,Chinese Academy of Sciences,Shanghai 200050,China

出　　处：《Science China(Physics,Mechanics & Astronomy)》2012年第4期649-653,共5页中国科学：物理学、力学、天文学（英文版）

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

摘　　要：Using the extended Blonder-Tinkham-Klapwijk formalism, we investigate the conductance spectra of graphene ferromagnet/p wave superconductor junctions. It is found that the conductance spectra are affected by the p wave pairing symmetry. The ferromagnetic exchange energy in the ferromagnet can suppress Andreev retroreflection but enhance the specular Andreev reflection in graphene ferromagnet/p wave superconductor junctions. The conductance decreases with increasing exchange energy Eh for Eh〈Er （the Fermi energy in the ferromagnet region）, but the conductance increases with increasing exchange energy Eh for Eh〉EF.Using the extended Blonder-Tinkham-Klapwijk formalism,we investigate the conductance spectra of graphene ferromagnet/p wave superconductor junctions.It is found that the conductance spectra are affected by the p wave pairing symmetry.The ferromagnetic exchange energy in the ferromagnet can suppress Andreev retroreflection but enhance the specular Andreev reflection in graphene ferromagnet/p wave superconductor junctions.The conductance decreases with increasing exchange energy Eh for Eh <EF(the Fermi energy in the ferromagnet region),but the conductance increases with increasing exchange energy Eh for Eh >EF.

关 键 词：GRAPHENE FERROMAGNET p wave superconductor tunneling conductance 

分 类 号：O511[理学—低温物理] TM271[理学—物理]