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

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

2005-08-14

arxiv.org/abs/cond-mat/0508333v1

Phys. Rev. B 72, 113107 (2005)

Physics

Condensed Matter

Statistical Mechanics

4 pages, revtex4, Phys. Rev. B, accepted

Scientific paper

10.1103/PhysRevB.72.113107

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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