Wigner molecules in polygonal quantum dots: A density-functional study

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dc.contributor Aalto-yliopisto fi
dc.contributor Aalto University en
dc.contributor.author Räsänen, Esa
dc.contributor.author Saarikoski, H.
dc.contributor.author Puska, M.J.
dc.contributor.author Nieminen, R.M.
dc.date.accessioned 2018-05-22T14:38:17Z
dc.date.available 2018-05-22T14:38:17Z
dc.date.issued 2003-01-31
dc.identifier.citation Räsänen , E , Saarikoski , H , Puska , M J & Nieminen , R M 2003 , ' Wigner molecules in polygonal quantum dots: A density-functional study ' PHYSICAL REVIEW B , vol 67 , no. 3 , 035326 , pp. 1-7 . DOI: 10.1103/PhysRevB.67.035326 en
dc.identifier.issn 2469-9950
dc.identifier.issn 1550-235X
dc.identifier.other PURE UUID: 671528b3-d8ec-4fa5-a0e8-039b62a6ad54
dc.identifier.other PURE ITEMURL: https://research.aalto.fi/en/publications/wigner-molecules-in-polygonal-quantum-dots-a-densityfunctional-study(671528b3-d8ec-4fa5-a0e8-039b62a6ad54).html
dc.identifier.other PURE FILEURL: https://research.aalto.fi/files/14664881/PhysRevB.67.035326.pdf
dc.identifier.uri https://aaltodoc.aalto.fi/handle/123456789/30954
dc.description.abstract We investigate the properties of many-electron systems in two-dimensional polygonal (triangle, square, pentagon, hexagon) potential wells by using the density-functional theory. The development of the ground-state electronic structure as a function of the dot size is of particular interest. First, we show that in the case of two electrons, the Wigner molecule formation agrees with previous exact diagonalization studies. Then we present in detail how the spin symmetry breaks in polygonal geometries as the spin density-functional theory is applied. In several cases with more than two electrons, we find a transition to the crystallized state, yielding coincidence with the number of density maxima and the electron number. We show that this transition density, which agrees reasonably well with previous estimations, is rather insensitive to both the shape of the dot and the electron number. en
dc.format.extent 7
dc.format.extent 1-7
dc.format.mimetype application/pdf
dc.language.iso en en
dc.relation.ispartofseries PHYSICAL REVIEW B en
dc.relation.ispartofseries Volume 67, issue 3 en
dc.rights openAccess en
dc.title Wigner molecules in polygonal quantum dots: A density-functional study en
dc.type A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä fi
dc.description.version Peer reviewed en
dc.contributor.department Department of Applied Physics
dc.subject.keyword density-functional theory
dc.subject.keyword spin density wave
dc.subject.keyword wigner molecule
dc.identifier.urn URN:NBN:fi:aalto-201805222394
dc.identifier.doi 10.1103/PhysRevB.67.035326
dc.type.version publishedVersion


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