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Interplay between fractional quantum Hall liquid and crystal phases at low filling

Journal Article · · Physical Review. B
 [1];  [2];  [3];  [3];  [4];  [5];  [3]
  1. Pennsylvania State Univ., University Park, PA (United States); Henan Univ. of Science and Technology, Luoyang (China). Henan Key Lab. of Photoelectric Energy Storage Materials and Applications; Penn State
  2. Inst. of Mathematical Sciences, HBNI, CIT Campus, Chennai (India)
  3. Pennsylvania State Univ., University Park, PA (United States)
  4. Univ. Paris-Saclay, Gif-sur-Yvette (France). Inst. de Physique Théorique
  5. Wrocław Univ. of Science and Technology, Wrocław (Poland)

The nature of the state at low Landau-level filling factors has been a long-standing puzzle in the field of the fractional quantum Hall effect (FQHE). While theoretical calculations suggest that a crystal is favored at filling factors $$\nu$$≲1/6, experiments show, at somewhat elevated temperatures, minima in the longitudinal resistance that are associated with fractional quantum Hall effect at $$\nu$$ 1/7, 2/11, 2/13, 3/19, 1/9, 2/15, and 2/17, which belong to the standard sequences $$\nu$$ =n/(6n ± 1) and $$\nu$$=n/(8n ± 1). To address this paradox, we investigate the nature of some of the low-$$\nu$$ states, specifically $$\nu$$= 1/7, 2/13, and 1/9, by variational Monte Carlo, density matrix renormalization group, and exact diagonalization methods. We conclude that in the thermodynamic limit, these are likely to be incompressible fractional quantum Hall liquids, albeit with strong short-range crystalline correlations. Finally, this suggests a natural explanation for the experimentally observed behavior and a rich phase diagram that admits, in the low-disorder limit, a multitude of crystal-FQHE liquid transitions as the filling factor is reduced.

Research Organization:
Pennsylvania State Univ., University Park, PA (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES); National Natural Science Foundation of China (NNSFC)
Contributing Organization:
Penn State; Henan University of Science and Technology, China; Institute for Mathematical Sciences, India; CNRS France; Wroclaw University, Poland
Grant/Contract Number:
SC0005042
OSTI ID:
1773670
Journal Information:
Physical Review. B, Journal Name: Physical Review. B Journal Issue: 7 Vol. 102; ISSN 2469-9950
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English

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