Universal spin dynamics in quantum wires

E. A. Fajardo, U. Zülicke, and R. Winkler
Phys. Rev. B 96, 155304 – Published 13 October 2017

Abstract

We discuss the universal spin dynamics in quasi-one-dimensional systems including the real spin in narrow-gap semiconductors like InAs and InSb, the valley pseudospin in staggered single-layer graphene, and the combination of real spin and valley pseudospin characterizing single-layer transition metal dichalcogenides (TMDCs) such as MoS2, WS2, MoS2, and WSe2. All these systems can be described by the same Dirac-like Hamiltonian. Spin-dependent observable effects in one of these systems thus have counterparts in each of the other systems. Effects discussed in more detail include equilibrium spin currents, current-induced spin polarization (Edelstein effect), and spin currents generated via adiabatic spin pumping. Our work also suggests that a long-debated spin-dependent correction to the position operator in single-band models should be absent.

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  • Received 24 July 2017

DOI:https://doi.org/10.1103/PhysRevB.96.155304

©2017 American Physical Society

Physics Subject Headings (PhySH)

  1. Physical Systems
  1. Techniques
Condensed Matter, Materials & Applied Physics

Authors & Affiliations

E. A. Fajardo1,*, U. Zülicke2, and R. Winkler1,3

  • 1Department of Physics, Northern Illinois University, DeKalb, Illinois 60115, USA
  • 2School of Chemical and Physical Sciences and MacDiarmid Institute for Advanced Materials and Nanotechnology, Victoria University of Wellington, P.O. Box 600, Wellington 6140, New Zealand
  • 3Materials Science Division, Argonne National Laboratory, Argonne, Illinois 60439, USA

  • *On leave from Department of Physics, Mindanao State University-Main Campus, Marawi City, Lanao del Sur, Philippines 9700; eafajardo@niu.edu

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Issue

Vol. 96, Iss. 15 — 15 October 2017

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