Magneto-electric photocurrent generated by direct inter-band transitions in InGaAs/InAlAs two-dimensional electron gas

Abstract

We report observation of magneto-electric photocurrent generated via direct inter-band transitions in an InGaAs/InAlAs two-dimensional electron gas excited by a linearly polarized incident light.The electric current is proportional to the in-plane magnetic field which unbalances the velocities of the photoexcited carriers with opposite spins and consequently generates electric current from a spin photocurrent. The observed light polarization dependence of the electric current is explained microscopically by taking into account of the anisotropy of the photoexcited carrier density in wave vector space. The spin photocurrent can be extracted from the measured current and the conversion coefficient of spin photocurrent to electric current is estimated to be $10^{-3}$$\sim$$10^{-2}$ per Tesla.

References in corpus (11)

• Direct electronic measurement of the spin Hall effect
• Experimental observation of the spin-Hall effect in a two dimensional spin-orbit coupled semiconductor system
• Electronic measurement and control of spin transport in Silicon
• Pure spin current from one-photon absorption of linearly polarized light in noncentrosymmetric semiconductors
• Zero-bias spin separation
• Magneto-Gyrotropic Photogalvanic Effects in Semiconductor Quantum Wells
• Pure spin photocurrents in low-dimensional structures
• Observation of electric current induced by optically injected spin current
• Deduction of Pure Spin Current from Spin Linear and Circular Photogalvanic Effect in Semiconductor Quantum Wells
• Direct measurement of a pure spin current by a polarized light beam
• Transverse electric current induced by optically injected spin current in cross-shaped InGaAs/InAlAs system

Cited by in corpus (4)

• Valley Zeeman effect and spin-valley polarized conductance in monolayer MoS${}_2$ in a perpendicular magnetic field
• Direct current driven by ac electric field in quantum wells
• Spin and orbital mechanisms of the magneto-gyrotropic photogalvanic effects in GaAs/AlGaAs quantum well structures
• Theory of magnetoelectric photocurrent generated by direct interband transitions in semiconductor quantum well