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arXiv · 1401.2427

Antiferromagnetic Order in a Semiconductor Quantum Well with Spin-Orbit Coupling

D. C. Marinescu
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Abstract

An argument is made on the existence of a low-temperature itinerant antiferromagnetic (AF) spin alignment, rather than persistent helical (PH), in the ground state of a two dimensional electron gas in a semiconductor quantum well with linear spin-orbit Rashba-Dresselhaus interaction at equal coupling strengths, $α$. This result is obtained on account of the opposite-spin single-particle state degeneracy at $\mb k = 0$ that makes the spin instability possible. A theory of the resulting magnetic phase is formulated within the Hartree-Fock approximation of the Coulomb interaction. In the AF state the direction of the fractional polarization is obtained to be aligned along the displacement vector of the single-particle states.

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D. C. Marinescu. 2014-01-10. Antiferromagnetic Order in a Semiconductor Quantum Well with Spin-Orbit Coupling. https://doi.org/10.1016/j.physe.2015.01.016

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