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Non-Equilibrium Magnetization in a Ballistic Quantum Dot

T. Swahn·E. N. Bogachek·Yu. M. Galperin·M. Jonson·R. I. Shekhter
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Abstract

We show that Aharonov-Bohm (AB) oscillations in the magnetic moment of an integrable ballistic quantum dot can be destroyed by a time dependent magnetic flux. The effect is due to a nonequilibrium population of perfectly coherent electronic states. For real ballistic systems the equilibrization process, which involves a special type of inelastic electron backscattering, can be so ineffective, that AB oscillations are suppressed when the flux varies with frequency $ω\sim$ 10$^7$-10$^8$ s$^{-1}$. The effect can be used to measure relaxation times for inelastic backscattering.

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T. Swahn, E. N. Bogachek, Yu. M. Galperin, M. Jonson, R. I. Shekhter. 1994-04-27. Non-Equilibrium Magnetization in a Ballistic Quantum Dot. https://doi.org/10.1103/physrevlett.73.162

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