Microwave spectroscopic observation of a Wigner solid within the ν=1/2 fractional quantum Hall effect

Hatke, A. T.; Liu, Yang; Engel, L. W.; Pfeiffer, L. N.; West, K. W.; Baldwin, K. W.; Shayegan, M.

doi:10.1103/physrevb.95.045417

Microwave spectroscopic observation of a Wigner solid within the $ν = 1 / 2$ fractional quantum Hall effect

Journal Article · Fri Jan 20 00:00:00 EST 2017 · Physical Review B

DOI:https://doi.org/10.1103/physrevb.95.045417· OSTI ID:1535844

Hatke, A. T. ^[1]; Liu, Yang ^[2]; Engel, L. W. ^[3]; Pfeiffer, L. N. ^[2]; West, K. W. ^[2]; Baldwin, K. W. ^[2]; Shayegan, M. ^[2]

National High Magnetic Field Laboratory, Tallahassee, FL (United States); DOE/OSTI
Princeton Univ., NJ (United States)
National High Magnetic Field Laboratory, Tallahassee, FL (United States)

We have studied the microwave spectra of a wide quantum well for Landau level fillings, ν, just below 1/2, under conditions where the ν = 1/2 fractional quantum Hall effect (FQHE) is present. One resonance in the spectra exhibits intensity variations with ν in striking agreement with that expected for a pinning mode of a Wigner solid of quasiholes of this FQHE state. This resonance is also quite sensitive to asymmetrization of the growth-direction charge distribution in the quantum well by gate bias. Another resonance in the spectra is associated with a different bilayer Wigner solid that also exists at much lower ν than the 1/2 FQHE, and that appears to coexist with the 1/2 quasihole solid.

View Accepted Manuscript (DOE)

Research Organization:: Florida State Univ., Tallahassee, FL (United States)

Sponsoring Organization:: USDOE; USDOE Office of Science (SC)

Grant/Contract Number:: FG02-05ER46212

OSTI ID:: 1535844

Alternate ID(s):: OSTI ID: 1341290

Journal Information:: Physical Review B, Journal Name: Physical Review B Journal Issue: 4 Vol. 95; ISSN 2469-9950; ISSN PRBMDO

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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