Eur. Phys. J. B 28, 483-489 (2002)
https://doi.org/10.1140/epjb/e2002-00251-5

Low-energy spectrum and finite temperature properties of quantum rings

Department of Physics, University of Jyväskylä, 40321 Jyväskylä, Finland

Corresponding author: ^a Matti.Manninen@phys.jyu.fi

Received: 18 January 2002
Published online: 13 August 2002

Abstract

Recently it was demonstrated that the rotational and vibrational spectra of quantum rings containing few electrons can be described quantitatively by an effective spin-Hamiltonian combined with rigid center-of-mass rotation and internal vibrations of localized electrons. We use this model Hamiltonian to study the quantum rings at finite temperatures and in presence of a nonzero magnetic field. Total spin, angular momentum and pair correlation show similar phase diagram which can be understood with help of the rotational spectrum of the ring.