title: Stability of spin droplets in realistic quantum Hall devices.
abstract: We study the formation and characteristics of 'spin droplets', i.e. compact spin-polarized configurations in the highest occupied Landau level, in an etched quantum Hall device at filling factors 2 ≤ ν ≤ 3. The confining potential for electrons is obtained with self-consistent electrostatic calculations on a GaAs/AlGaAs heterostructure with experimental system parameters. Real-space spin-density-functional calculations for electrons confined in the obtained potential show the appearance of stable spin droplets at ν ~ 5/2. The qualitative features of the spin droplet are similar to those in idealized (parabolic) quantum-dot systems. The universal stability of the state against geometric deformations underlines the applicability of spin droplets in, for example, spin-transport through quantum point contacts.
authors.affiliation: Physics Department, Faculty of Science, Istanbul University, 34134 Vezneciler Istanbul, Turkey. huseyinatci@gmail.com
authors.forename: H
authors.initials: H
authors.lastname: Atci
authors.forename: U
authors.initials: U
authors.lastname: Erkarslan
authors.forename: A
authors.initials: A
authors.lastname: Siddiki
authors.forename: E
authors.initials: E
authors.lastname: Räsänen