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Fractionally charged skyrmions in fractional quantum Hall effect

Journal Article · · Nature Communications
DOI:https://doi.org/10.1038/ncomms9981· OSTI ID:1239802
 [1];  [2];  [3];  [4];  [5]
  1. Pennsylvania State Univ., State College, PA (United States); Penn State University, University Park, PA USA
  2. Technical Univ. of Munchen (Germany); Nanosystems Initiative Munich (NIM) (Germany)
  3. Univ. of Wroclaw (Poland)
  4. Columbia Univ., New York, NY (United States)
  5. Pennsylvania State Univ., State College, PA (United States)

The fractional quantum Hall effect has inspired searches for exotic emergent topological particles, such as fractionally charged excitations, composite fermions, abelian and nonabelian anyons and Majorana fermions. Fractionally charged skyrmions, which support both topological charge and topological vortex-like spin structure, have also been predicted to occur in the vicinity of 1/3 filling of the lowest Landau level. The fractional skyrmions, however, are anticipated to be exceedingly fragile, suppressed by very small Zeeman energies. Here we show that, slightly away from 1/3 filling, the smallest manifestations of the fractional skyrmion exist in the excitation spectrum for a broad range of Zeeman energies, and appear in resonant inelastic light scattering experiments as well-defined resonances slightly below the long wavelength spin wave mode. The spectroscopy of these exotic bound states serves as a sensitive tool for investigating the residual interaction between composite fermions, responsible for delicate new fractional quantum Hall states in this filling factor region.

Research Organization:
Penn State University, University Park, PA (United States). Department of Physics
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
Grant/Contract Number:
SC0005042
OSTI ID:
1239802
Journal Information:
Nature Communications, Journal Name: Nature Communications Vol. 6; ISSN 2041-1723
Publisher:
Nature Publishing GroupCopyright Statement
Country of Publication:
United States
Language:
English

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