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Title: Pomeranchuk Instability of Composite Fermi Liquids

Journal Article · · Physical Review Letters
 [1];  [2];  [3];  [4];  [5]
  1. The Ohio State Univ., Columbus, OH (United States)
  2. Binghamton Univ., NY (United States)
  3. Cornell Univ., Ithaca, NY (United States)
  4. Princeton Univ., NJ (United States)
  5. California State Univ., Los Angeles, CA (United States)

Nematicity in quantum Hall systems has been experimentally well established at excited Landau levels. The mechanism of the symmetry breaking, however, is still unknown. Pomeranchuk instability of Fermi liquid parameter F ≤ –1 in the angular momentum ℓ = 2 channel has been argued to be the relevant mechanism, yet there are no definitive theoretical proofs. Here we calculate, using the variational Monte Carlo technique, Fermi liquid parameters F of the composite fermion Fermi liquid with a finite layer width. We consider F in different Landau levels n = 0, 1, 2 as a function of layer width parameter η. We find that unlike the lowest Landau level, which shows no sign of Pomeranchuk instability, higher Landau levels show nematic instability below critical values of η. Furthermore, the critical value ηc is higher for the n = 2 Landau level, which is consistent with observation of nematic order in ambient conditions only in the n = 2 Landau levels. As a result, the picture emerging from our work is that approaching the true 2D limit brings half-filled higher Landau-level systems to the brink of nematic Pomeranchuk instability.

Research Organization:
Princeton Univ., NJ (United States); Cornell Univ., Ithaca, NY (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
SC0002140; SC0010313
OSTI ID:
1610649
Alternate ID(s):
OSTI ID: 1475471
Journal Information:
Physical Review Letters, Vol. 121, Issue 14; ISSN 0031-9007
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 12 works
Citation information provided by
Web of Science

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Cited By (9)

Electron–electron interactions and the paired-to-nematic quantum phase transition in the second Landau level journal June 2018
Geometric resonance of four-flux composite fermions journal July 2019
Interaction-dependent anisotropy of fractional quantum Hall states journal August 2019
Universal collective modes in two-dimensional chiral superfluids journal September 2019
Two-particle Fermi liquid parameters at the Mott transition: Vertex divergences, Landau parameters, and incoherent response in dynamical mean-field theory journal June 2019
Unconventional Anisotropic Even-Denominator Fractional Quantum Hall State in a System with Mass Anisotropy journal December 2018
Two-particle Fermi liquid parameters at the Mott transition: Vertex divergences, Landau parameters, and incoherent response in dynamical mean-field theory text January 2018
Unconventional anisotropic even-denominator fractional quantum Hall state in a system with mass anisotropy text January 2018
Interaction-dependent anisotropy of fractional quantum Hall states text January 2019

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