Asymmetric Andreev resonant state with a magnetic exchange field in spin- triplet superconducting monolayer MoS2

被引:0
|
作者
Goudarzi, H. [1 ]
Khezerlou, M. [1 ,2 ]
Ebadzadeh, S. F. [1 ]
机构
[1] Urmia Univ, Fac Sci, Dept Phys, POB 165, Orumiyeh, Iran
[2] Natl Elites Fdn, Tehran, Iran
关键词
Magnetic exchange field; Monolayer molybdenum disulfide; Triplet superconductivity; Andreev process; MAGNETORESISTANCE;
D O I
10.1016/j.physe.2017.10.018
中图分类号
TB3 [工程材料学];
学科分类号
0805 ; 080502 ;
摘要
We study the influence of magnetic exchange field (MEF) on the chirality of Andreev resonant state (ARS) appearing at the relating monolayer MoS2 ferromagnet/superconductor interface, in which the induced pairing order parameter is chiral p-wave symmetry. Transmission of low-energy Dirac-like electron (hole) quasiparticles through a ferromagnet/superconductor (F/S) interface is considered based on Dirac-Bogoliubov-de Gennes Hamiltonian and, of course, Andreev reflection process. The magnetic exchange field of a ferromagnetic section on top of ML-MDS may affect the electron (hole) excitations for spin-up and spin-down electrons, differently. We find the chirality symmetry of ARS to be conserved in the absence of MEF, whereas it is broken in the presence of MEF. Tuning the MEF enables one to control either electrical properties (such as band gap, SOC and etc.) or spin-polarized transport. The resulting normal conductance is found to be more sensitive to the magnitude of MEF and doping regime of F region. Unconventional spin-triplet p-wave symmetry features the zero-bias conductance, which strongly depends on p-doping level of F region in the relating NFS junction. A sharp conductance switching in zero is achieved in the absence of SOC.
引用
收藏
页码:69 / 74
页数:6
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