Universal Spin Dynamics in Quantum Wires
arXiv:1707.07408 · doi:10.1103/PhysRevB.96.155304
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 MoS, WS, MoSe, and WSe. 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.
arXiv comment8 pages, 4 figures, published version
References in corpus (16)
- The electronic properties of graphene
- Spintronics: Fundamentals and applications
- Coupled spin and valley physics in monolayers of MoS2 and other group-VI dichalcogenides
- Valley contrasting physics in graphene: magnetic moment and topological transport
- Valley filter and valley valve in graphene
- k.p theory for two-dimensional transition metal dichalcogenide semiconductors
- Scattering approach to parametric pumping
- Valley susceptibility of an interacting two-dimensional electron system
- Valley splitting of AlAs two-dimensional electrons in a perpendicular magnetic field
- Time-Resolved Detection of Individual Electrons in a Quantum Dot
- Pumping spin with electrical fields
- Spin Current Generation and Detection in the Presence of AC Gate
- Oscillatory multiband dynamics of free particles: The ubiquity of zitterbewegung effects
- A prohibition of equilibrium spin currents in multi-terminal ballistic devices
- Temperature dependence of D'yakonov-Perel' spin relaxation in zinc blende semiconductor quantum structures
- Anomalous spin precession and spin Hall effect in semiconductor quantum wells