Abstract：
:Liquid crystalline phases of matter permeate nature and technology, with examples 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 suggest 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.
journal_name
Nat Communjournal_title
Nature communicationsauthors
Qian Q,Nakamura J,Fallahi S,Gardner GC,Manfra MJdoi
10.1038/s41467-017-01810-ysubject
Has Abstractpub_date
2017-11-16 00:00:00pages
1536issue
1issn
2041-1723pii
10.1038/s41467-017-01810-yjournal_volume
8pub_type
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