Synthetic-gauge-field-induced Dirac semimetal state in an acoustic resonator system

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 synt...

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প্রধান লেখক: Yang, Zhaoju, Gao, Fei, Shi, Xihang, Zhang, Baile
অন্যান্য লেখক: School of Physical and Mathematical Sciences
বিন্যাস: Journal Article
ভাষা:English
প্রকাশিত: 2017
বিষয়গুলি:
অনলাইন ব্যবহার করুন:https://hdl.handle.net/10356/84076
http://hdl.handle.net/10220/42919
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author Yang, Zhaoju
Gao, Fei
Shi, Xihang
Zhang, Baile
author2 School of Physical and Mathematical Sciences
author_facet School of Physical and Mathematical Sciences
Yang, Zhaoju
Gao, Fei
Shi, Xihang
Zhang, Baile
author_sort Yang, Zhaoju
collection NTU
description 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.
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spelling ntu-10356/840762023-02-28T19:41:19Z Synthetic-gauge-field-induced Dirac semimetal state in an acoustic resonator system Yang, Zhaoju Gao, Fei Shi, Xihang Zhang, Baile School of Physical and Mathematical Sciences Centre for Disruptive Photonic Technologies (CDPT) Dirac node Synthetic gauge field 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. MOE (Min. of Education, S’pore) Published version 2017-07-18T09:24:56Z 2019-12-06T15:37:48Z 2017-07-18T09:24:56Z 2019-12-06T15:37:48Z 2016 Journal Article 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-. 1367-2630 https://hdl.handle.net/10356/84076 http://hdl.handle.net/10220/42919 10.1088/1367-2630/aa4fa9 en New Journal of Physics © 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. 7 p. application/pdf
spellingShingle Dirac node
Synthetic gauge field
Yang, Zhaoju
Gao, Fei
Shi, Xihang
Zhang, Baile
Synthetic-gauge-field-induced Dirac semimetal state in an acoustic resonator system
title Synthetic-gauge-field-induced Dirac semimetal state in an acoustic resonator system
title_full Synthetic-gauge-field-induced Dirac semimetal state in an acoustic resonator system
title_fullStr Synthetic-gauge-field-induced Dirac semimetal state in an acoustic resonator system
title_full_unstemmed Synthetic-gauge-field-induced Dirac semimetal state in an acoustic resonator system
title_short Synthetic-gauge-field-induced Dirac semimetal state in an acoustic resonator system
title_sort synthetic gauge field induced dirac semimetal state in an acoustic resonator system
topic Dirac node
Synthetic gauge field
url https://hdl.handle.net/10356/84076
http://hdl.handle.net/10220/42919
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AT gaofei syntheticgaugefieldinduceddiracsemimetalstateinanacousticresonatorsystem
AT shixihang syntheticgaugefieldinduceddiracsemimetalstateinanacousticresonatorsystem
AT zhangbaile syntheticgaugefieldinduceddiracsemimetalstateinanacousticresonatorsystem