RT Journal Article
T1 Interacting electrons in polygonal quantum dots
A1 Creffield, Charles
A1 Háusler, Wolfgang
A1 Jefferson, John H
A1 Sarkar, Sarben
AB The low-lying eigenstates of a system of two electrons confined within a two-dimensional quantum dot with a hard polygonal boundary are obtained by means of exact diagonalization. The transition from a weakly correlated charge distribution for small dots to a strongly correlated ‘‘Wigner molecule’’ for large dots is studied, and the behavior at the crossover is determined. In sufficiently large dots, a recently proposed mapping to an effective charge-spin model is investigated, and is found to produce the correct ordering of the energy levels and to give a good first approximation to the size of the level spacings. We conclude that this approach is a valuable method to obtain the low-energy spectrum of few-electron quantum dots.
PB American Physical Society
SN 1098-0121
YR 1999
FD 1999-04-15
LK https://hdl.handle.net/20.500.14352/59755
UL https://hdl.handle.net/20.500.14352/59755
LA eng
NO ©1999 The American Physical Society.C.E.C. is grateful for financial support from the Leverhulme Foundation and W.H. acknowledges support by the Deutsche Forschungsgemeinschaft through SFB 276. EU support from the TMR program is also gratefully acknowledged.
NO Leverhulme Foundation
NO Deutsche Forschungsgemeinschaft
NO EU TMR program
DS Docta Complutense
RD 4 abr 2025