Electronelectron interactions in square quantum dots
Abstract
We investigate the electronic structure of quasitwodimensional square quantum dots by using the spindensity functional theory. In the weak interacting regime, we identify shell fillings due to Hund's rule and calculate the electronnumberdependent addition energies of the dots. To understand the interplay between the kinetic energy and Coulomb energy we examine the groundstate spin and charge configurations by varying size of the dot. We estimate the existence of the Wignermoleculelike state at a critical mean distance parameter r_{s}~6a^{*}_{B}.
 Publication:

Physical Review B
 Pub Date:
 April 2001
 DOI:
 10.1103/PhysRevB.63.165301
 Bibcode:
 2001PhRvB..63p5301A
 Keywords:

 73.21.b;
 73.23.Hk;
 73.40.c;
 73.40.Kp;
 Electron states and collective excitations in multilayers quantum wells mesoscopic and nanoscale systems;
 Coulomb blockade;
 singleelectron tunneling;
 Electronic transport in interface structures;
 IIIV semiconductortosemiconductor contacts pn junctions and heterojunctions