Prediction of large linear-in-k spin splitting for holes in the 2D GaAs/AlAs system

Abstract

The spin-orbit interaction generally leads to spin splitting (SS) of electron and hole energy states in solids, a splitting that is characterized by a scaling with the wavevector $\mathbf{k}$. Whereas for {\it 3D bulk zincblende} solids the electron (heavy hole) SS exhibits a cubic (linear) scaling with $k$, in {\it 2D quantum-wells} the electron (heavy hole) SS is currently believed to have a mostly linear (cubic) scaling. Such expectations are based on using a small 3D envelope function basis set to describe 2D physics. By treating instead the 2D system explicitly in a multi-band many-body approach we discover a large linear scaling of hole states in 2D. This scaling emerges from hole bands coupling that would be unsuspected by the standard model that judges coupling by energy proximity. This discovery of a linear Dresselhaus k-scaling for holes in 2D implies a different understanding of hole-physics in low-dimensions.

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References in corpus (7)

• Dissipationless Quantum Spin Current at Room Temperature
• Spin relaxation and decoherence of holes in quantum dots
• Observation of extremely slow hole spin relaxation in self-assembled quantum dots
• Cubic Dresselhaus Spin-Orbit Coupling in 2D Electron Quantum Dots
• Absence of skew scattering in two-dimensional systems: Testing the origins of the anomalous Hall effect
• Interference of heavy holes in an Aharonov-Bohm ring
• Two-dimensional magnetoexcitons in the presence of spin-orbit coupling

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• Skyrmion Formation and Optical Spin-Hall Effect in an Expanding Coherent Cloud of Indirect Excitons
• Supercoupling between heavy-hole and light-hole states in self-assembled quantum dots
• Emergence of the strong tunable linear Rashba spin-orbit coupling of two-dimensional hole gases in semiconductor quantum
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• Conserved Spin Quantity in Strained Hole Systems with Rashba and Dresselhaus Spin-Orbit Coupling
• Effective one-band approach for the spin splittings in quantum wells
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• Spin-dependent coherent transport of two-dimensional excitons
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• Spin polarisation and spin dependent scattering of holes in transverse magnetic focussing
• Stochastic Faraday rotation induced by the electric current fluctuations in nanosystems
• Self-consistent quasi-particle $GW$ and hybrid functional calculations for Al/InAs/Al heterojunctions: band offset and spin-orbit coupling effects
• Quantification of the heavy-hole--light-hole mixing in two-dimensional hole gases