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
Published online: 13 August 2002
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.
PACS: 73.21.Hb – Quantum wires / 73.21.La – Quantum dots / 71.10.Pm – Fermions in reduced dimensions
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag, 2002