Szczegóły publikacji
Opis bibliograficzny
Magnetic-field-induced phase transitions in Wigner molecules / B. SZAFRAN, S. BEDNAREK, J. ADAMOWSKI // Journal of Physics : Condensed Matter ; ISSN 0953-8984. — 2003 — vol. 15 iss. 24, s. 4189–4205. — Bibliogr. s. 4204–4205, Abstr.
Autorzy (3)
Dane bibliometryczne
| ID BaDAP | 15076 |
|---|---|
| Data dodania do BaDAP | 2004-02-02 |
| Tekst źródłowy | URL |
| DOI | 10.1088/0953-8984/15/24/313 |
| Rok publikacji | 2003 |
| Typ publikacji | artykuł w czasopiśmie |
| Otwarty dostęp |  |
| Czasopismo/seria | Journal of Physics-Condensed Matter |
Abstract
A theoretical analysis of formation and symmetry transformations is presented for Wigner molecules with N = 2,...,20 electrons confined in quantum dots at high magnetic fields. Using the unrestricted Hartree-Fock method with the multicentre Gaussian basis, we have found that Wigner molecules with N greater than or equal to 6 abruptly change their shape and symmetry with an associated jump in the first derivative of the ground-state energy, i.e. they undergo phase transitions. In particular, the phases of the Wigner molecules obtained just after emerging from the maximum-density droplet (MDD) phase possess a different symmetry from that formed at a high magnetic field. We show that the properties of the electron-electron interaction energy demonstrate very well both the breakdown of the MDD and the quasi-classical character of the Wigner molecule in the high magnetic field. Possible mechanisms of the MDD decay are discussed.
