Quasi-particle properties from tunneling in the ν = 5/2 fractional quantum hall state

Iuliana P. Radu, J. B. Miller, C. M. Marcus, M. A. Kastner, L. N. Pfeiffer, K. W. West

Research output: Contribution to journalArticlepeer-review

286 Scopus citations

Abstract

Quasi-particles with fractional charge and statistics, as well as modified Coulomb interactions, exist in a two-dimensional electron system in the fractional quantum Hall (FQH) regime. Theoretical models of the FQH state at filling fraction ν = 5/2 make the further prediction that the wave function can encode the interchange of two quasi-particles, making this state relevant for topological quantum computing. We show that bias-dependent tunneling across a narrow constriction at ν = 5/2 exhibits temperature scaling and, from fits to the theoretical scaling form, extract values for the effective charge and the interaction parameter of the quasi-particles. Ranges of values obtained are consistent with those predicted by certain models of the 5/2 state.

Original languageEnglish (US)
Pages (from-to)899-902
Number of pages4
JournalScience
Volume320
Issue number5878
DOIs
StatePublished - May 16 2008
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • General

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