# Self-organized bosonic domain walls

## Abstract

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 $\rho =\frac{1}{2}$ 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

- Authors:

- Publication Date:

- Research Org.:
- Univ. of California, Davis, CA (United States)

- Sponsoring Org.:
- USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22). Materials Sciences & Engineering Division; National Natural Science Foundation of China (NNSFC)

- OSTI Identifier:
- 1595178

- Alternate Identifier(s):
- OSTI ID: 1597052

- Grant/Contract Number:
- SC0014671

- Resource Type:
- Published Article

- Journal Name:
- Physical Review Research

- Additional Journal Information:
- Journal Name: Physical Review Research Journal Volume: 2 Journal Issue: 1; Journal ID: ISSN 2643-1564

- Publisher:
- American Physical Society

- Country of Publication:
- United States

- Language:
- English

- Subject:
- 36 MATERIALS SCIENCE; 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY

### Citation Formats

```
Zhu, Xingchuan, Dong, Shiying, Lin, Yang, Mondaini, Rubem, Guo, Huaiming, Feng, Shiping, and Scalettar, Richard T. Self-organized bosonic domain walls. United States: N. p., 2020.
Web. doi:10.1103/PhysRevResearch.2.013085.
```

```
Zhu, Xingchuan, Dong, Shiying, Lin, Yang, Mondaini, Rubem, Guo, Huaiming, Feng, Shiping, & Scalettar, Richard T. Self-organized bosonic domain walls. United States. doi:10.1103/PhysRevResearch.2.013085.
```

```
Zhu, Xingchuan, Dong, Shiying, Lin, Yang, Mondaini, Rubem, Guo, Huaiming, Feng, Shiping, and Scalettar, Richard T. Mon .
"Self-organized bosonic domain walls". United States. doi:10.1103/PhysRevResearch.2.013085.
```

```
@article{osti_1595178,
```

title = {Self-organized bosonic domain walls},

author = {Zhu, Xingchuan and Dong, Shiying and Lin, Yang and Mondaini, Rubem and Guo, Huaiming and Feng, Shiping and Scalettar, Richard T.},

abstractNote = {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=12 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},

doi = {10.1103/PhysRevResearch.2.013085},

journal = {Physical Review Research},

number = 1,

volume = 2,

place = {United States},

year = {2020},

month = {1}

}

DOI: 10.1103/PhysRevResearch.2.013085

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