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강상관계 물질 연구단
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Band Gap Closing in a Synthetic Hall Tube of Neutral Fermions

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Title
Band Gap Closing in a Synthetic Hall Tube of Neutral Fermions
Author(s)
Jeong Ho Han; Jin Hyoun Kang; Y. Shin
Publication Date
2019-02
Journal
PHYSICAL REVIEW LETTERS, v.122, no.6, pp.065303 -
Publisher
AMER PHYSICAL SOC
Abstract
We report the experimental realization of a synthetic three-leg Hall tube with ultracold fermionic atoms in a one-dimensional optical lattice. The legs of the synthetic tube are composed of three hyperfine spin states of the atoms, and the cyclic interleg links are generated by two-photon Raman transitions between the spin states, resulting in a uniform gauge flux φ penetrating each side plaquette of the tube. Using quench dynamics, we investigate the band structure of the Hall tube system for a commensurate flux φ=2π/3. Momentum-resolved analysis of the quench dynamics reveals a critical point of band gap closing as one of the interleg coupling strengths is varied, which is consistent with a topological phase transition predicted for the Hall tube system. © 2019 American Physical Society
URI
https://pr.ibs.re.kr/handle/8788114/6482
ISSN
0031-9007
Appears in Collections:
Center for Correlated Electron Systems(강상관계 물질 연구단) > Journal Papers (저널논문)
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