Fabry-Perot interferometry with fractional charges

D. T. McClure, W. Chang, C. M. Marcus, L. N. Pfeiffer, K. W. West

Research output: Contribution to journalArticlepeer-review

69 Scopus citations

Abstract

Resistance oscillations in electronic Fabry-Perot interferometers near fractional quantum Hall (FQH) filling factors 1/3, 2/3, 4/3, and 5/3 in the constrictions are compared to those near integer quantum Hall (IQH) filling factors in the same devices and at the same gate voltages. Two-dimensional plots of resistance versus gate voltage and magnetic field indicate that all oscillations are Coulomb dominated. A charging-model analysis of gate-voltage periods yields an effective tunneling charge e * e/3 for all FQH states and e * e for IQH states. Temperature decay of the oscillations appears exponential, qualitatively consistent with a recent prediction, and the surprising filling-factor dependence of the associated energy scale may shed light on edge structure.

Original languageEnglish (US)
Article number256804
JournalPhysical review letters
Volume108
Issue number25
DOIs
StatePublished - Jun 19 2012
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • General Physics and Astronomy

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