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arXiv · 1102.0039

Spontaneous Emergence of Persistent Spin Helix from Homogeneous Spin Polarization

V. A. Slipko·I. Savran·Y. V. Pershin
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Abstract

We demonstrate that a homogeneous spin polarization in one-dimensional structures of finite length in the presence of Bychkov-Rashba spin-orbit coupling decays spontaneously toward a persistent spin helix. The analysis of formation of spin helical state is presented within a novel approach based on a mapping of spin drift-diffusion equations into a heat equation for a complex field. Such a strikingly different and simple method allows generating robust spin structures whose properties can be tuned by the strength of the spin orbit interaction and/or structure's length. We generalize our results for two-dimensional case predicting formation of persistent spin helix in two-dimensional channels from homogeneous spin polarization.

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V. A. Slipko, I. Savran, Y. V. Pershin. 2011-01-31. Spontaneous Emergence of Persistent Spin Helix from Homogeneous Spin Polarization. https://doi.org/10.1103/physrevb.83.193302

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