Electron-electron interactions and the paired-to-nematic quantum phase transition in the second Landau level

K. A. Schreiber, N. Samkharadze, G. C. Gardner, Y. Lyanda-Geller, M. J. Manfra, L. N. Pfeiffer, K. W. West, G. A. Csáthy

Research output: Contribution to journalArticleScientificpeer-review

10 Citations (Scopus)
13 Downloads (Pure)

Abstract

In spite of its ubiquity in strongly correlated systems, the competition of paired and nematic ground states remains poorly understood. Recently such a competition was reported in the two-dimensional electron gas at filling factor ν = 5/2. At this filling factor a pressure-induced quantum phase transition was observed from the paired fractional quantum Hall state to the quantum Hall nematic. Here we show that the pressure-induced paired-to-nematic transition also develops at ν = 7/2, demonstrating therefore this transition in both spin branches of the second orbital Landau level. However, we find that pressure is not the only parameter controlling this transition. Indeed, ground states consistent with those observed under pressure also develop in a sample measured at ambient pressure, but in which the electron-electron interaction was tuned close to its value at the quantum critical point. Our experiments suggest that electron-electron interactions play a critical role in driving the paired-to-nematic transition.

Original languageEnglish
Article number2400
JournalNature Communications
Volume9
Issue number1
DOIs
Publication statusPublished - 1 Dec 2018

Fingerprint Dive into the research topics of 'Electron-electron interactions and the paired-to-nematic quantum phase transition in the second Landau level'. Together they form a unique fingerprint.

  • Cite this

    Schreiber, K. A., Samkharadze, N., Gardner, G. C., Lyanda-Geller, Y., Manfra, M. J., Pfeiffer, L. N., West, K. W., & Csáthy, G. A. (2018). Electron-electron interactions and the paired-to-nematic quantum phase transition in the second Landau level. Nature Communications, 9(1), [2400]. https://doi.org/10.1038/s41467-018-04879-1