Various spin-polarization states beyond the maximum-density droplet: a quantum Monte Carlo study

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Journal Title
Journal ISSN
Volume Title
A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
Date
2002
Major/Subject
Mcode
Degree programme
Language
en
Pages
1-4
Series
Physical Review B, Volume 65, issue 12
Abstract
Using a variational quantum Monte Carlo method, the effect of Landau-level mixing on the lowest-energy–state diagram of small quantum dots is studied in the magnetic-field range where the density of magnetic flux quanta just exceeds the density of electrons. An accurate analytical many-body wave function is constructed for various angular momentum and spin states in the lowest Landau level, and Landau-level mixing is then introduced using a Jastrow factor. The effect of higher Landau levels is shown to be significant; the transition lines are shifted considerably towards higher values of magnetic field and certain lowest-energy states vanish altogether.
Description
Keywords
Landau-level mixing, maximum-density droplet, quantum dot, quantum Monte Carlo
Other note
Citation
Siljamäki , S , Harju , A , Nieminen , R M , Sverdlov , V A & Hyvönen , P 2002 , ' Various spin-polarization states beyond the maximum-density droplet: a quantum Monte Carlo study ' , Physical Review B , vol. 65 , no. 12 , 121306 , pp. 1-4 . https://doi.org/10.1103/PhysRevB.65.121306