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Possible nematic to smectic phase transition in a two-dimensional electron gas at half-filling

Journal Article · · Nature Communications
 [1];  [2];  [2];  [2];  [2]
  1. Purdue Univ., West Lafayette, IN (United States); None
  2. Purdue Univ., West Lafayette, IN (United States)

Liquid crystalline phases of matter permeate nature and technology, with instances ranging from cell membranes to liquid-crystal displays. Remarkably, electronic liquid-crystal phases can exist in two-dimensional electron systems (2DES) at half Landau-level filling in the quantum Hall regime. Theory has predicted the existence of a liquid-crystal smectic phase that breaks both rotational and translational symmetries. However, previous experiments in 2DES are most consistent with an anisotropic nematic phase breaking only rotational symmetry. Here we report three transport phenomena at half-filling in ultra-low disorder 2DES: a non-monotonic temperature dependence of the sample resistance, dramatic onset of large time-dependent resistance fluctuations, and a sharp feature in the differential resistance suggestive of depinning. These data imply that a sequence of symmetry-breaking phase transitions occurs as temperature is lowered: first a transition from an isotropic liquid to a nematic phase and finally to a liquid-crystal smectic phase.

Research Organization:
Purdue Univ., West Lafayette, IN (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
Grant/Contract Number:
SC0006671
OSTI ID:
1526282
Journal Information:
Nature Communications, Journal Name: Nature Communications Journal Issue: 1 Vol. 8; ISSN 2041-1723
Publisher:
Nature Publishing GroupCopyright Statement
Country of Publication:
United States
Language:
English

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Cited By (9)

Observation of new plasmons in the fractional quantum Hall effect: interplay of topological and nematic orders text January 2019
Electron–electron interactions and the paired-to-nematic quantum phase transition in the second Landau level journal June 2018
Finite-temperature behavior in the second Landau level of the two-dimensional electron gas journal June 2018
Orientation of hole quantum Hall nematic phases in an out-of-plane electric field journal May 2019
Current Flow in the Bubble and Stripe Phases journal March 2018
Unconventional Anisotropic Even-Denominator Fractional Quantum Hall State in a System with Mass Anisotropy journal December 2018
Observation of new plasmons in the fractional quantum Hall effect: Interplay of topological and nematic orders journal March 2019
Orientation of hole quantum Hall nematic phases in an out-of-plane electric field text January 2019
Unconventional anisotropic even-denominator fractional quantum Hall state in a system with mass anisotropy text January 2018

Figures / Tables (5)


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