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arXiv · 1211.6764

Two-Beam Spin Noise Spectroscopy

Yuriy V. Pershin·Valeriy A. Slipko·Dibyendu Roy·Nikolai A. Sinitsyn
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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.

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Yuriy V. Pershin, Valeriy A. Slipko, Dibyendu Roy, Nikolai A. Sinitsyn. 2013-07-03. Two-Beam Spin Noise Spectroscopy. https://doi.org/10.1063/1.4807011

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