Tuning spin transport across two-dimensional organometallic junctions

被引:4
|
作者
Liu, Shuanglong [1 ,2 ]
Wang, Yun-Peng [1 ,2 ]
Li, Xiangguo [1 ,2 ]
Fry, James N. [1 ]
Cheng, Hai-Ping [1 ,2 ]
机构
[1] Univ Florida, Dept Phys, Gainesville, FL 32611 USA
[2] Univ Florida, Quantum Theory Project, Gainesville, FL 32611 USA
关键词
AUGMENTED-WAVE METHOD; SHEET; GAS;
D O I
10.1103/PhysRevB.97.035409
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
We study via first-principles modeling and simulation two-dimensional spintronic junctions made of metalorganic frameworks consisting of two Mn-phthalocyanine ferromagnetic metal leads and semiconducting Ni-phthalocyanine channels of various lengths. These systems exhibit a large tunneling magnetoresistance ratio; the transmission functions of such junctions can be tuned using gate voltage by three orders of magnitude. We find that the origin of this drastic change lies in the orbital alignment and hybridization between the leads and the center electronic states. With physical insight into the observed on-off phenomenon, we predict a gate-controlled spin current switch based on two-dimensional crystallines and offer general guidelines for designing spin junctions using 2D materials.
引用
收藏
页数:8
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