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Dataset for Exchange-mediated dynamic screening in the integer quantum Hall effect regime

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Römer, Rudolf A. and Oswald, J. (2017) Dataset for Exchange-mediated dynamic screening in the integer quantum Hall effect regime. [Dataset] (Submitted)

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Abstract

We study many-body interaction effects in the spatially-resolved filling factor (ν) distribution for higher Landau levels (LLs) via self-consistent Hartree-Fock simulations in the integer quantum Hall (IQH) regime. Our results indicate a strong, interaction-induced tendency to avoid the simultaneous existence of partially filled spin-up and spin-down LLs. Rather, we find that such partially filled LLs consist of coexisting regions of full and empty LLs. At the boundaries between the regions of full and empty LLs, we observe edge stripes of nearly constant ν close to half filling. This suggests that the exchange interaction induces a behavior similar to a Hund’s rule for the occupation of the spin split LLs. The screening of the disorder and edge potential appears significantly reduced as compared to static Thomas-Fermi screening [1]. Our results are consistent with a local, lateral ν dependence of the exchange-enhanced spin splitting. Hence, on quantum-coherent length scales as probed here, the electron system of the IQH effect behaves similar to a non-interacting single particle system — not because of the absence, but rather due to the dominance of many-body effects.

Item Type: Dataset
Subjects: Q Science > QC Physics
Divisions: Faculty of Science > Physics
Type of Data: Numerical simulation results
Library of Congress Subject Headings (LCSH): Quantum Hall effect, Electrons, Magnetic fields, Quantum field theory, Electron transport, Mesoscopic phenomena (Physics)
Publisher: Department of Physics, University of Warwick
Official Date: 15 February 2017
Dates:
DateEvent
15 February 2017Accepted
Status: Not Peer Reviewed
Publication Status: Submitted
Media of Output: Text and image files
Access rights to Published version: Open Access
Description:

hall_edge1_ns1-data-21050_ECs2_21050

to

hall_edge1_ns1-data-21050_ECs2_21250

and

ECs2_21050

to

ECs2_21250

RIOXX Funder/Project Grant:
Project/Grant IDRIOXX Funder NameFunder ID
P19353-N16Schweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschunghttp://dx.doi.org/10.13039/501100001711
EP/J003476/1[EPSRC] Engineering and Physical Sciences Research Councilhttp://dx.doi.org/10.13039/501100000266
EP/K000128/1[EPSRC] Engineering and Physical Sciences Research Councilhttp://dx.doi.org/10.13039/501100000266
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Contributors:
ContributionNameContributor ID
Data contributorRoemer, Rudolf A.1192

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