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Skyrmions in a Half-Filled Second Landau Level

Wójs, Arkadiusz, Möller, Gunnar, Simon, Steven H, Cooper, Nigel R (2011) Skyrmions in a Half-Filled Second Landau Level. In: AIP Conference Proceedings. 30th International Conference on the Physics of Semiconductors. 1399. pp. 631-632. IOP Institute of Physics ISBN 978-0-7354-1002-2. (doi:10.1063/1.3666536)

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We studied charged excitations of the ?=5/2 fractional quantum Hall state allowing for spin depolarization. It is generally accepted that the ground state is a spin?polarized incompressible quantum liquid, adiabatically connected to the Pfaffian state, whose spin?polarized quasiholes (QHs) obey non?Abelian statistics. Using numerical diagonalization and taking account of non?zero well widths we demonstrated that at a sufficiently low Zeeman energy it is energetically favorable for pairs of charge e/4 QHs to bind into charge e/2 Skyrmions. We showed that Skyrmion formation is further promoted by disorder, and argue that this can lead to a depolarized ground state in realistic experimental situations.

Item Type: Conference or workshop item (Paper)
DOI/Identification number: 10.1063/1.3666536
Uncontrolled keywords: Physics of Quantum Materials, Skyrmions, Moore-Read state, quasiholes, non-Abelian phases, Physics of Quantum Materials
Subjects: Q Science > QC Physics > QC173.45 Condensed Matter
Divisions: Faculties > Sciences > School of Physical Sciences
Faculties > Sciences > School of Physical Sciences > Functional Materials Group
Depositing User: Gunnar Moller
Date Deposited: 11 Dec 2017 13:40 UTC
Last Modified: 17 Jul 2019 11:13 UTC
Resource URI: (The current URI for this page, for reference purposes)
Möller, Gunnar:
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