Two-Beam Spin Noise Spectroscopy
Abstract
We propose a method of two-beam spin noise spectroscopy to test the spin transport at equilibrium via analysis of correlations between time-shifted spin fluctuations at different space locations. This method allows one to determine the strength of spin-orbit interaction and spin relaxation time and separate spin noise of conducting electrons from the background noise of localized electrons. We formulate a theory of two-beam spin noise spectroscopy in semiconductor wires with Bychkov-Rashba spin-orbit interaction taking into account several possible spin relaxation channels and finite size of laser beams. Our theory predicts a peak shift with respect to the Larmor frequency to higher or lower frequencies depending on the strength of spin orbit interaction and distance between the beams. The two-beam spin noise spectroscopy could find applications in experimental studies of semiconductors, emergent materials and many other systems.
Cite
@article{arxiv.1211.6764,
title = {Two-Beam Spin Noise Spectroscopy},
author = {Yuriy V. Pershin and Valeriy A. Slipko and Dibyendu Roy and Nikolai A. Sinitsyn},
journal= {arXiv preprint arXiv:1211.6764},
year = {2016}
}