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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 | ||||||||||||
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| 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 | ||||||||||||
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| Status: | Not Peer Reviewed | ||||||||||||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 |
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