Magnetic properties of quantum dots and rings
Abstract
Exact many-body methods as well as current-spin-density functional theory are used to study the magnetism and electron localization in two-dimensional quantum dots and quasi-one-dimensional quantum rings. Predictions of broken-symmetry solutions within the density functional model are confirmed by exact configuration interaction (CI) calculations: In a quantum ring the electrons localize to form an antiferromagnetic chain which can be described with a simple model Hamiltonian. In a quantum dot the magnetic field localizes the electrons as predicted with the density functional approach.
- Publication:
-
European Physical Journal D
- Pub Date:
- 2001
- DOI:
- 10.1007/s100530170134
- Bibcode:
- 2001EPJD...16..381M
- Keywords:
-
- 73.21.La;
- 73.43.Nq;
- 85.35.Be;
- Quantum dots;
- Quantum phase transitions;
- Quantum well devices