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High Conductivity Mediated by Thermal Excitation of Solectrons
Author(s) -
Ebeling W.,
Chetverikov A. P.,
Röpke G.,
Velarde M. G.
Publication year - 2013
Publication title -
contributions to plasma physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.531
H-Index - 47
eISSN - 1521-3986
pISSN - 0863-1042
DOI - 10.1002/ctpp.201310047
Subject(s) - physics , excited state , electron , excitation , lattice (music) , nonlinear system , momentum (technical analysis) , quantum , atomic physics , condensed matter physics , quantum mechanics , finance , acoustics , economics
We study the quantum dynamics and statistics of electrons interacting with nonlinear excitations of a classical thermal lattice of atoms on a semi‐phenomenological basis. By theoretical estimates based on tight‐binding approximations, Wigner distributions and computer simulations we show the existence of fast and nearly loss‐free motions of electrons along crystallographic axes of a nonlinear lattice. Using mass‐action relations we estimate the density of moving bound states between electrons and lattice solitons and estimate analytically and by simulations Wigner momentum distributions which are non‐Maxwellian. Calculating the currents from these bimodal distributions we show that thermally excited solectrons in nonlinear media may lead to a considerable transport enhancement. Our estimates and simulations demonstrate that in a temperature window, where solectrons are excited and are relatively stable, conductivity and diffusion may be enhanced by up to two orders of magnitude. (© 2013 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)