Electron self-trapping and fluctuation density-of-states tail at the critical point

M. I. Auslender; M. I. Katsnelson

doi:10.1103/physrevb.72.113107

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Electron self-trapping and fluctuation density-of-states tail at the critical point

M. I. Auslender·M. I. Katsnelson

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Abstract

We consider electron self-trapping due to its interaction with order-parameter fluuctuations at the second-order phase-transition or critical point (for example, at the Curie temperature in magnetic or ferroelectric semiconductors). Using Feynman path integral approach the autolocalization energy and the size of the self-trapped state (fluctuon) are estimated. It is shown that the fluctuon states are connected with the Lifshitz tail of the electron density-of-states, the parameters of this tail being determined by the critical exponents.

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M. I. Auslender, M. I. Katsnelson. 2005-08-14. Electron self-trapping and fluctuation density-of-states tail at the critical point. https://doi.org/10.1103/physrevb.72.113107

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