title: Skyrmions in the Moore-Read state at nu=5/2.
abstract: We study charged excitations of the non-Abelian Moore-Read liquid at a filling factor nu=5/2, allowing for spin depolarization. Using a combination of numerical studies, and taking account of nonzero well widths, we find that at a sufficiently low Zeeman energy it is energetically favorable for charge e/4 quasiholes to bind into Skyrmions of charge e/2. We show that Skyrmion formation is further promoted by disorder, and argue that this can lead to a depolarized nu=5/2 ground state in realistic experimental situations. We comment on the consequences for the activated transport.
authors.affiliation: TCM Group, Cavendish Laboratory, University of Cambridge, Cambridge CB3 0HE, United Kingdom.
authors.forename: Arkadiusz
authors.initials: A
authors.lastname: Wójs
authors.forename: Gunnar
authors.initials: G
authors.lastname: Möller
authors.forename: Steven H
authors.initials: SH
authors.lastname: Simon
authors.forename: Nigel R
authors.initials: NR
authors.lastname: Cooper