• 文献标题:   Strain-controlled spin and charge pumping in graphene devices via spin-orbit coupled barriers
  • 文献类型:   Article
  • 作  者:   MOHAMMADKHANI R, ABDOLLAHIPOUR B, ALIDOUST M
  • 作者关键词:  
  • 出版物名称:   EPL
  • ISSN:   0295-5075 EI 1286-4854
  • 通讯作者地址:   Univ Zanjan
  • 被引频次:   15
  • DOI:   10.1209/0295-5075/111/67005
  • 出版年:   2015

▎ 摘  要

We theoretically propose a graphene-based adiabatic quantum pump with intrinsic spin-orbit coupling (SOC) subject to strain where two time-dependent extrinsic spin-orbit coupled barriers drive spin and charge currents. We study three differing operation modes where i) location, ii) chemical potential, and iii) SOC of the two barriers oscillate periodically and out of phase around their equilibrium states. Our results demonstrate that the amplitude of adiabatically pumped currents highly depends on the considered operation mode. We find that such a device operates with highest efficiency and in a broader range of parameters where the barriers' chemical potential drives the quantum pump. Our results also reveal that by introducing strain to the system, one can suppress or enhance the charge and spin currents separately, depending on the strain direction. Copyright (C) EPLA, 2015