Microwave spectroscopic observation of distinct electron solid phases in wide quantum wells

A. T. Hatke, Yang Liu, B. A. Magill, B. H. Moon, L. W. Engel, M. Shayegan, L. N. Pfeiffer, K. W. West, K. W. Baldwin

Research output: Contribution to journalArticle

16 Scopus citations

Abstract

In high magnetic fields, two-dimensional electron systems can form a number of phases in which interelectron repulsion plays the central role, since the kinetic energy is frozen out by Landau quantization. These phases include the well-known liquids of the fractional quantum Hall effect, as well as solid phases with broken spatial symmetry and crystalline order. Solids can occur at the low Landau-filling termination of the fractional quantum Hall effect series but also within integer quantum Hall effects. Here we present microwave spectroscopy studies of wide quantum wells that clearly reveal two distinct solid phases, hidden within what in d.c. transport would be the zero diagonal conductivity of an integer quantum-Hall-effect state. Explanation of these solids is not possible with the simple picture of a Wigner solid of ordinary (quasi) electrons or holes.

Original languageEnglish (US)
Article number4154
JournalNature communications
Volume5
DOIs
StatePublished - Jun 20 2014

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Biochemistry, Genetics and Molecular Biology(all)
  • Physics and Astronomy(all)

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    Hatke, A. T., Liu, Y., Magill, B. A., Moon, B. H., Engel, L. W., Shayegan, M., Pfeiffer, L. N., West, K. W., & Baldwin, K. W. (2014). Microwave spectroscopic observation of distinct electron solid phases in wide quantum wells. Nature communications, 5, [4154]. https://doi.org/10.1038/ncomms5154