Finite-thickness effects in ground-state transitions of two-electron quantum dots

Autor:	Nazmitdinov, R. G., Simonovic, N. S.
Rok vydání:	2007
Předmět:	Condensed Matter - Mesoscale and Nanoscale Physics
Zdroj:	Phys. Rev. B76, 193306 (2007)
Druh dokumentu:	Working Paper
DOI:	10.1103/PhysRevB.76.193306
Popis:	Using the exactly solvable excitation spectrum of two-electron quantum dots with parabolic potential, we show that the inclusion of the vertical extension of the quantum dot provides a consistent description of the experimental findings of Nishi et al. [Phys.Rev.B75, 121301(R) (2007)]. We found that the second singlet-triplet transition in the ground state is a vanishing function of the lateral confinement in the three-dimensional case, while it always persists in the two-dimensional case. We show that a slight decrease of the lateral confinement leads to a formation of the Wigner molecule at low magnetic fields. Comment: 5 pages, 4 figures
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/0711.1246 Zobrazit plný text záznamu View this record from Arxiv