Possible nematic to smectic phase transition in a two-dimensional electron gas at half-filling
Abstract
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.
- Authors:
-
- Purdue Univ., West Lafayette, IN (United States)
- Publication Date:
- Research Org.:
- Purdue Univ., West Lafayette, IN (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Basic Energy Sciences (BES)
- OSTI Identifier:
- 1526282
- Grant/Contract Number:
- SC0006671
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Nature Communications
- Additional Journal Information:
- Journal Volume: 8; Journal Issue: 1; Journal ID: ISSN 2041-1723
- Publisher:
- Nature Publishing Group
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 42 ENGINEERING
Citation Formats
Qian, Q., Nakamura, J., Fallahi, S., Gardner, G. C., and Manfra, M. J. Possible nematic to smectic phase transition in a two-dimensional electron gas at half-filling. United States: N. p., 2017.
Web. doi:10.1038/s41467-017-01810-y.
Qian, Q., Nakamura, J., Fallahi, S., Gardner, G. C., & Manfra, M. J. Possible nematic to smectic phase transition in a two-dimensional electron gas at half-filling. United States. https://doi.org/10.1038/s41467-017-01810-y
Qian, Q., Nakamura, J., Fallahi, S., Gardner, G. C., and Manfra, M. J. Thu .
"Possible nematic to smectic phase transition in a two-dimensional electron gas at half-filling". United States. https://doi.org/10.1038/s41467-017-01810-y. https://www.osti.gov/servlets/purl/1526282.
@article{osti_1526282,
title = {Possible nematic to smectic phase transition in a two-dimensional electron gas at half-filling},
author = {Qian, Q. and Nakamura, J. and Fallahi, S. and Gardner, G. C. and Manfra, M. J.},
abstractNote = {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.},
doi = {10.1038/s41467-017-01810-y},
journal = {Nature Communications},
number = 1,
volume = 8,
place = {United States},
year = {Thu Nov 16 00:00:00 EST 2017},
month = {Thu Nov 16 00:00:00 EST 2017}
}
Web of Science
Figures / Tables:
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