DOI: 10.1209/epl/i2001-00558-3


Europhys. Lett., 56 (4) , pp. 570-575 (2001)

ESR theory for interacting 1D quantum wires

A. De Martino^{1, 2} and R. Egger<sup>1

1</sup>  Institut für Theoretische Physik, Heinrich-Heine-Universität D-40225 Düsseldorf, Germany
²  Fakultät für Physik, Albert-Ludwigs-Universität D-79104 Freiburg, Germany

(Received 18 June 2001; accepted in final form 31 August 2001)

Abstract
We compute the electron spin resonance (ESR) intensity for one-dimensional quantum wires in semiconductor heterostructures, taking into account electron-electron interactions and spin-orbit coupling. The ESR spectrum is shown to be very sensitive to interactions. While in the absence of interactions the spectrum is a flat band, characteristic threshold singularities appear in the interacting limit. This suggests the practical use of ESR to reveal spin dynamics in a Luttinger liquid.

PACS
71.10.Pm - Fermions in reduced dimensions (anyons, composite fermions, Luttinger liquid, etc.).
73.21.Hb - Quantum wires.
76.30.-v - Electron paramagnetic resonance and relaxation.


© EDP Sciences 2001