Correlated Quantum Transport of Density Wave Electrons
Abstract
Recently observed AharonovBohm quantum interference of the period h/2e in charge density wave rings strongly suggests that correlated density wave electron transport is a cooperative quantum phenomenon. The picture discussed here posits that quantum solitons nucleate and transport current above a Coulomb blockade threshold field. We propose a fielddependent tunneling matrix element and use the Schrödinger equation, viewed as an emergent classical equation as in Feynman’s treatment of Josephson tunneling, to compute the evolving macrostate amplitudes, finding excellent quantitative agreement with voltage oscillations and currentvoltage characteristics in NbSe_{3}. A proposed phase diagram shows the conditions favoring soliton nucleation versus classical depinning.
 Publication:

Physical Review Letters
 Pub Date:
 January 2012
 DOI:
 10.1103/PhysRevLett.108.036404
 arXiv:
 arXiv:1109.4619
 Bibcode:
 2012PhRvL.108c6404M
 Keywords:

 71.45.Lr;
 75.30.Fv;
 03.75.Lm;
 74.50.+r;
 Chargedensitywave systems;
 Spindensity waves;
 Tunneling Josephson effect BoseEinstein condensates in periodic potentials solitons vortices and topological excitations;
 Tunneling phenomena;
 point contacts weak links Josephson effects;
 Condensed Matter  Strongly Correlated Electrons;
 Quantum Physics
 EPrint:
 9 pages, 4 figures, (5 pages &