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Zhang RX, Liu CX. Fingerprints of a Bosonic Symmetry-Protected Topological State in a Quantum Point Contact. Phys Rev Lett. 2017;118(21):216803doi: 10.1103/PhysRevLett.118.216803.
Zhang, R. X., & Liu, C. X. (2017). Fingerprints of a Bosonic Symmetry-Protected Topological State in a Quantum Point Contact. Physical review letters, 118(21), 216803. https://doi.org/10.1103/PhysRevLett.118.216803
Zhang, Rui-Xing, and Liu, Chao-Xing. "Fingerprints of a Bosonic Symmetry-Protected Topological State in a Quantum Point Contact." Physical review letters vol. 118,21 (2017): 216803. doi: https://doi.org/10.1103/PhysRevLett.118.216803
Zhang RX, Liu CX. Fingerprints of a Bosonic Symmetry-Protected Topological State in a Quantum Point Contact. Phys Rev Lett. 2017 May 26;118(21):216803. doi: 10.1103/PhysRevLett.118.216803. Epub 2017 May 26. PMID: 28598641.
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Phys Rev Lett. 2017 May 26;118(21):216803. doi: 10.1103/PhysRevLett.118.216803. Epub 2017 May 26.

Fingerprints of a Bosonic Symmetry-Protected Topological State in a Quantum Point Contact.

Physical review letters

Rui-Xing Zhang, Chao-Xing Liu

Affiliations

  1. Department of Physics, The Pennsylvania State University, University Park, Pennsylvania 16802, USA.

PMID: 28598641 DOI: 10.1103/PhysRevLett.118.216803

Abstract

In this work, we study the transport through a quantum point contact for bosonic helical liquid that exists at the edge of a bilayer graphene under a strong magnetic field. We identify "smoking gun" transport signatures to distinguish a bosonic symmetry-protected topological (BSPT) state from a fermionic two-channel quantum spin Hall (QSH) state in this system. In particular, a novel charge-insulator-spin-conductor phase is found for the BSPT state, while either the charge-insulator-spin-insulator or the charge-conductor-spin-conductor phase is expected for the two-channel QSH state. Consequently, a simple transport measurement will reveal the fingerprint of bosonic topological physics in bilayer graphene systems.

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