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Title: Self-organized bosonic domain walls

Journal Article · · Physical Review Research
 [1];  [2];  [3]; ORCiD logo [4];  [2]; ORCiD logo [1];  [5]
  1. Beijing Normal Univ. (China)
  2. Beihang Univ., Beijing (China)
  3. Beihang Univ., Beijing (China); Beijing Information Science and Technology Univ. (China)
  4. Beijing Computational Science Research Center (China)
  5. Univ. of California, Davis, CA (United States)

Hard-core bosons on honeycomb lattice ribbons with zigzag edges are studied using exact numerical simulations. We map out the phase diagrams of ribbons with different widths, which contain superfluid and insulator phases at various fillings. We show that charge domain walls are energetically favorable, in sharp contrast to the more typical occupation of a set of sites on a single sublattice of the bipartite geometry at ρ = 1 2 filling. This “self-organized domain wall” separates two charge-density-wave regions with opposite Berry curvatures. Associated with the change of topological properties, superfluid transport occurs down the domain wall. Our results provide a concrete context to observe bosonic topological phenomena and can be simulated experimentally using bosonic cold atoms trapped in designed optical lattices

Research Organization:
Univ. of California, Davis, CA (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22). Materials Sciences & Engineering Division; National Natural Science Foundation of China (NSFC)
Grant/Contract Number:
SC0014671
OSTI ID:
1595178
Alternate ID(s):
OSTI ID: 1597052
Journal Information:
Physical Review Research, Vol. 2, Issue 1; ISSN 2643-1564
Publisher:
American Physical SocietyCopyright Statement
Country of Publication:
United States
Language:
English

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