Electron self-trapping and fluctuation density-of-states tail at the critical point
arXiv:cond-mat/0508333 · doi:10.1103/PhysRevB.72.113107
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.
arXiv comment4 pages, revtex4, Phys. Rev. B, accepted
References in corpus (4)
- Quantum phase transition from a superfluid to a Mott insulator in a gas of ultracold atoms
- Colossal Magnetoresistant Materials: The Key Role of Phase Separation
- Magnetic Polarons and the Metal-Semiconductor Transition in (Eu,La)B6 and EuO: Raman Scattering Studies
- Magnetic polarons and magnetoresistance in EuB6