6533b870fe1ef96bd12cfb03
RESEARCH PRODUCT
Stability of spin droplets in realistic quantum Hall devices
H. AtciH. AtciUğur ErkarslanAfif SiddikiEsa RäsänenEsa Räsänensubject
PhysicsCondensed Matter - Mesoscale and Nanoscale PhysicsCondensed matter physicsFOS: Physical sciencesHeterojunction02 engineering and technologyLandau quantizationElectronRealistic quantumQuantum Hall effectCondensed Matter::Mesoscopic Systems and Quantum Hall Effect021001 nanoscience & nanotechnologyCondensed Matter Physics01 natural sciencesStability (probability)Mesoscale and Nanoscale Physics (cond-mat.mes-hall)0103 physical sciencesCondensed Matter::Strongly Correlated ElectronsGeneral Materials Science010306 general physics0210 nano-technologyQuantumSpin-½description
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 $2\leq\nu\leq3$. 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 $\nu\sim 5/2$. 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 underline the applicability of spin droplets in, e.g., spin-transport through quantum point contacts.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2013-01-28 |