TY - JOUR
T1 - Fractionally charged skyrmions in fractional quantum Hall effect
AU - Balram, Ajit C.
AU - Wurstbauer, U.
AU - Wójs, A.
AU - Pinczuk, A.
AU - Jain, J. K.
N1 - Funding Information:
We acknowledge financial support from the US Department of Energy, Office of Science, Basic Energy Sciences, under Award No. DE-SC0005042 (A.C.B., J.K.J.), from the US National Science Foundation under grant DMR-1306976 (A.P.), from the National Science Centre, Poland, under grant 2014/14/A/ST3/00654 (A.W.). We thank Research Computing and Cyberinfrastructure at Pennsylvania State University (supported in part through instrumentation funded by the National Science Foundation through grant OCI-0821527), Wrocław Centre for Networking and Supercomputing and Academic Computer Centre CYFRONET, both parts of PL-Grid Infrastructure, and the DFG excellence programme Nanosystems Initiative Munich (U.W.). We thank Indian Institute of Science Education and Research, Pune for their kind hospitality during the final stages of this work.
PY - 2015/11/26
Y1 - 2015/11/26
N2 - 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.
AB - 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.
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U2 - 10.1038/ncomms9981
DO - 10.1038/ncomms9981
M3 - Article
AN - SCOPUS:84948460050
SN - 2041-1723
VL - 6
JO - Nature communications
JF - Nature communications
M1 - 8981
ER -