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Title: Electric field induced spin and valley polarization within a magnetically confined silicene channel

Abstract

We study the electronic structure and transport properties of Dirac electrons along a channel created by an exchange field through the proximity of ferromagnets on a silicene sheet. The multiple total internal reflection induces localized states in the channel, which behaves like an electron waveguide. An effect of spin- and valley-filtering originating from the coupling between valley and spin degrees is predicted for such a structure. Interestingly, this feature can be tuned significantly by locally applying electric and exchange fields simultaneously. The parameter condition for observing fully spin- and valley-polarized current is obtained. These findings may be observable in todays' experimental technique and useful for spintronic and valleytronic applications based on silicene.

Authors:
; ; ;  [1];  [2]
  1. Department of Physics and Key Laboratory for Low-Dimensional Structures and Quantum Manipulation (Ministry of Education), Hunan Normal University, Changsha 410081 (China)
  2. Institute of Super-microstructure and Ultrafast Process in Advanced Materials, School of Physics and Electronics, Central South University, Changsha 410083 (China)
Publication Date:
OSTI Identifier:
22399179
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Applied Physics; Journal Volume: 116; Journal Issue: 24; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; COUPLING; ELECTRIC CONDUCTIVITY; ELECTRIC CURRENTS; ELECTRIC FIELDS; ELECTRONIC STRUCTURE; ELECTRONS; FERROMAGNETIC MATERIALS; FERROMAGNETISM; POLARIZATION; REFLECTION; SILICENE; SPIN

Citation Formats

Liu, Yiman, Zhou, Xiaoying, Zhou, Ma, Zhou, Guanghui, E-mail: ghzhou@hunnu.edu.cn, and Long, Meng-Qiu. Electric field induced spin and valley polarization within a magnetically confined silicene channel. United States: N. p., 2014. Web. doi:10.1063/1.4904751.
Liu, Yiman, Zhou, Xiaoying, Zhou, Ma, Zhou, Guanghui, E-mail: ghzhou@hunnu.edu.cn, & Long, Meng-Qiu. Electric field induced spin and valley polarization within a magnetically confined silicene channel. United States. doi:10.1063/1.4904751.
Liu, Yiman, Zhou, Xiaoying, Zhou, Ma, Zhou, Guanghui, E-mail: ghzhou@hunnu.edu.cn, and Long, Meng-Qiu. Sun . "Electric field induced spin and valley polarization within a magnetically confined silicene channel". United States. doi:10.1063/1.4904751.
@article{osti_22399179,
title = {Electric field induced spin and valley polarization within a magnetically confined silicene channel},
author = {Liu, Yiman and Zhou, Xiaoying and Zhou, Ma and Zhou, Guanghui, E-mail: ghzhou@hunnu.edu.cn and Long, Meng-Qiu},
abstractNote = {We study the electronic structure and transport properties of Dirac electrons along a channel created by an exchange field through the proximity of ferromagnets on a silicene sheet. The multiple total internal reflection induces localized states in the channel, which behaves like an electron waveguide. An effect of spin- and valley-filtering originating from the coupling between valley and spin degrees is predicted for such a structure. Interestingly, this feature can be tuned significantly by locally applying electric and exchange fields simultaneously. The parameter condition for observing fully spin- and valley-polarized current is obtained. These findings may be observable in todays' experimental technique and useful for spintronic and valleytronic applications based on silicene.},
doi = {10.1063/1.4904751},
journal = {Journal of Applied Physics},
number = 24,
volume = 116,
place = {United States},
year = {Sun Dec 28 00:00:00 EST 2014},
month = {Sun Dec 28 00:00:00 EST 2014}
}