Spontaneous magnetism of quantum dot lattices
(2003) In Physical Review Letters 90(6: 066802).- Abstract
- The magnetism of square lattices of quantum dots with up to 12 electrons per dot is studied using the spin-density functional formalism. At small values of the lattice constant, all lattices are nonmagnetic and gapless. When the lattice constant is increased, the shell structure of the single dots governs the magnetism of the lattice. At closed shells, the lattices are nonmagnetic and have a gap at the Fermi level. At the beginning and at the end of a shell, they become ferromagnetic and stay gapless up to large values of the lattice constant. Antiferromagnetism was observed only at midshell after a band gap was opened.
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/317470
- author
- Koskinen, M ; Reimann, Stephanie LU and Manninen, M
- organization
- publishing date
- 2003
- type
- Contribution to journal
- publication status
- published
- subject
- in
- Physical Review Letters
- volume
- 90
- issue
- 6: 066802
- publisher
- American Physical Society
- external identifiers
-
- wos:000181015900039
- pmid:12633316
- scopus:85038293244
- ISSN
- 1079-7114
- DOI
- 10.1103/PhysRevLett.90.066802
- language
- English
- LU publication?
- yes
- additional info
- The information about affiliations in this record was updated in December 2015. The record was previously connected to the following departments: Mathematical Physics (Faculty of Technology) (011040002)
- id
- 16346861-b9a3-49ea-bf82-8c318a07da5e (old id 317470)
- date added to LUP
- 2016-04-01 11:55:08
- date last changed
- 2022-02-18 07:14:09
@article{16346861-b9a3-49ea-bf82-8c318a07da5e, abstract = {{The magnetism of square lattices of quantum dots with up to 12 electrons per dot is studied using the spin-density functional formalism. At small values of the lattice constant, all lattices are nonmagnetic and gapless. When the lattice constant is increased, the shell structure of the single dots governs the magnetism of the lattice. At closed shells, the lattices are nonmagnetic and have a gap at the Fermi level. At the beginning and at the end of a shell, they become ferromagnetic and stay gapless up to large values of the lattice constant. Antiferromagnetism was observed only at midshell after a band gap was opened.}}, author = {{Koskinen, M and Reimann, Stephanie and Manninen, M}}, issn = {{1079-7114}}, language = {{eng}}, number = {{6: 066802}}, publisher = {{American Physical Society}}, series = {{Physical Review Letters}}, title = {{Spontaneous magnetism of quantum dot lattices}}, url = {{http://dx.doi.org/10.1103/PhysRevLett.90.066802}}, doi = {{10.1103/PhysRevLett.90.066802}}, volume = {{90}}, year = {{2003}}, }