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Title: Synthetic-gauge-field-induced Dirac semimetal state in an acoustic resonator system
Authors: Yang, Zhaoju
Gao, Fei
Shi, Xihang
Zhang, Baile
Keywords: Dirac node
Synthetic gauge field
Issue Date: 2016
Source: Yang, Z., Gao, F., Shi, X., & Zhang, B. (2016). Synthetic-gauge-field-induced Dirac semimetal state in an acoustic resonator system. New Journal of Physics, 18, 125003-.
Series/Report no.: New Journal of Physics
Abstract: Recently, a proposal of synthetic gauge field in reduced two-dimensional (2D) system from three-dimensional (3D) acoustic structure shows an analogue of the gapped Haldane model with fixed k z , and achieves the gapless Weyl semimetal phase in 3D momentum space. Here, extending this approach of synthetic gauge flux, we propose a reduced square lattice of acoustic resonators, which exhibits Dirac nodes with broken effective time-reversal symmetry. Protected by an additional hidden symmetry, these Dirac nodes with quantized values of topological charge are characterized by nonzero winding number and the finite structure exhibits flat edge modes that cannot be destroyed by perturbations.
ISSN: 1367-2630
DOI: 10.1088/1367-2630/aa4fa9
Schools: School of Physical and Mathematical Sciences 
Research Centres: Centre for Disruptive Photonic Technologies (CDPT) 
Rights: © 2016 IOP Publishing Ltd and Deutsche Physikalische Gesellschaft. Original content from this work may be used under the terms of the Creative Commons Attribution 3.0 licence. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI.
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:SPMS Journal Articles

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