dc.contributor.author | Avetisyan, A. A. | en |
dc.contributor.author | Moulopoulos, Konstantinos | en |
dc.contributor.author | Djotyan, Anahit P. | en |
dc.creator | Avetisyan, A. A. | en |
dc.creator | Moulopoulos, Konstantinos | en |
dc.creator | Djotyan, Anahit P. | en |
dc.date.accessioned | 2019-12-02T15:28:40Z | |
dc.date.available | 2019-12-02T15:28:40Z | |
dc.date.issued | 2008 | |
dc.identifier.issn | 1063-7788 | |
dc.identifier.uri | http://gnosis.library.ucy.ac.cy/handle/7/58510 | |
dc.description.abstract | We develop a variational many-body approach within a second quantized formulation for a few-electron system in a parabolic two-dimensional quantum dot (QD). By way of application, the nature of the ground state of a two-electron system in a parabolic QD in a broad range of magnetic fields is theoretically investigated. Various phase transitions on the basis of the resulting analytical expressions for energy of the system have been investigated: First, the well-known transition from a maximum density droplet to a Wigner phase in a magnetic field is obtained, provided that the QD is in conditions of weak confinement. Furthermore, in the case of relatively strong QD confinement and weak magnetic fields, a rotationally symmetric spin-singlet state is the ground state of the system. However, in a strong magnetic field and for the same QD confinement, a broken-symmetry spin-singlet state appears to be energetically favored over the symmetric spin-singlet state. A first investigation of such a broken-symmetry spin-singlet phase in a QD in a magnetic field is shown to be an important application of the proposed technique. © 2008 Pleiades Publishing, Ltd. | en |
dc.source | Physics of Atomic Nuclei | en |
dc.source.uri | https://www.scopus.com/inward/record.uri?eid=2-s2.0-44649091559&doi=10.1134%2fS1063778808050050&partnerID=40&md5=2cb1bb309749f983a18edd3d0ad88068 | |
dc.title | Phase transitions in a few-electron quantum dot in a magnetic field: Wigner phases and broken-symmetry spin-singlet states | en |
dc.type | info:eu-repo/semantics/article | |
dc.identifier.doi | 10.1134/S1063778808050050 | |
dc.description.volume | 71 | |
dc.description.issue | 5 | |
dc.description.startingpage | 800 | |
dc.description.endingpage | 806 | |
dc.author.faculty | Σχολή Θετικών και Εφαρμοσμένων Επιστημών / Faculty of Pure and Applied Sciences | |
dc.author.department | Τμήμα Φυσικής / Department of Physics | |
dc.type.uhtype | Article | en |
dc.source.abbreviation | Phys.At.Nucl. | en |
dc.contributor.orcid | Moulopoulos, Konstantinos [0000-0001-5139-436X] | |
dc.gnosis.orcid | 0000-0001-5139-436X | |