Quantum states and linear response in dc and electromagnetic fields for charge current and spin polarization of electrons at Bi/Si interface with giant spin-orbit coupling

Abstract

An expansion of the nearly free-electron model constructed by Frantzeskakis, Pons and Grioni [Phys. Rev. B {\bf 82}, 085440 (2010)] describing quantum states at Bi/Si(111) interface with giant spin-orbit coupling is developed and applied for the band structure and spin polarization calculation, as well as for the linear response analysis for charge current and induced spin caused by dc field and by electromagnetic radiation. It is found that the large spin-orbit coupling in this system may allow resolving the spin-dependent properties even at room temperature and at realistic collision rate. The geometry of the atomic lattice combined with spin-orbit coupling leads to an anisotropic response both for current and spin components related to the orientation of the external field. The in-plane dc electric field produces only the in-plane components of spin in the sample while both the in-plane and out-of-plane spin components can be excited by normally propagating electromagnetic wave with different polarizations.

10 pages, 9 figures

References in corpus (13)

• Silicon surface with giant spin-splitting
• Rashba and Dresselhaus Spin-Splittings in Semiconductor Quantum Wells Measured by Spin Photocurrents
• Rashba type spin-orbit splitting of quantum well states in ultrathin Pb films
• Pure spin current from one-photon absorption of linearly polarized light in noncentrosymmetric semiconductors
• Orbital and spin relaxation in single and coupled quantum dots
• A band structure scenario for the giant spin-orbit splitting observed at the Bi/Si(111) interface
• Tunable spin-gaps in a quantum-confined geometry
• Long-Lived Spin Coherence States
• Frequency dependence of induced spin polarization and spin current in quantum wells
• Spin-orbit lateral superlattices: energy bands and spin polarization in 2DEG
• Manipulating the spin texture in spin-orbit superlattice by terahertz radiation
• Terahertz radiation-induced conductivity, Kerr and Faraday angles, and spin textures in a two-dimensional electron gas with spin-orbit coupling subjected to a high magnetic field and periodic potential
• Fast optical control of spin dynamics in a quantum wire

Cited by in corpus (3)

• Spin-flip transitions induced by time-dependent electric fields in surfaces with strong spin-orbit interaction
• Position and Spin Control by Dynamical Ultrastrong Spin-Orbit Coupling
• Edge states and topological properties of electrons on the bismuth on silicon surface with giant spin-orbit coupling