Europhys. Lett.
Volume 67, Number 4, August 2004
Page(s) 641 - 647
Section Condensed matter: electronic structure, electrical, magnetic, and optical properties
Published online 01 August 2004
Europhys. Lett., 67 (4), pp. 641-647 (2004)
DOI: 10.1209/epl/i2004-10106-9

Elementary excitations in one-dimensional electromechanical systems; transport with back-reaction

Kang-Hun Ahn1 and Hangmo Yi2, 3

1  Department of Physics, Chungnam National University - Daejon 305-764, Korea
2  School of Physics, Korea Institute for Advanced Study - Seoul 130-722, Korea
3  Department of Physics, Soongsil University - Seoul 156-743, Korea

(Received 29 April 2004; accepted in final form 15 June 2004)

Using an exactly solvable model, we study the low-energy properties of a one-dimensional spinless electron fluid contained in a quantum-mechanically moving wire located in a static magnetic field. The phonon and electric currents are coupled via Lorentz force and the eigenmodes are described by two independent boson fluids. At low energies, the two boson modes are charged while one of them has excitation gap due to back-reaction of the Lorentz force. The theory is illustrated by evaluating optical absorption spectra. Our results are exact and show a non-perturbative regime of electron transport.

73.23.-b - Electronic transport in mesoscopic systems.
71.10.Pm - Fermions in reduced dimensions (anyons, composite fermions, Luttinger liquid, etc.).
72.15.-v - Electronic conduction in metals and alloys.

© EDP Sciences 2004