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  • Title: Stability of spin droplets in realistic quantum Hall devices.
    Author: Atci H, Erkarslan U, Siddiki A, Räsänen E.
    Journal: J Phys Condens Matter; 2013 Apr 17; 25(15):155604. PubMed ID: 23507801.
    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.
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