Discrete time crystal made of topological edge magnons

We report the emergence of time-crystalline behavior in the \pi-Berry phase protected edge states of a Heisenberg ferromagnet in the presence of an external driving field. The magnon amplification due to the external field spontaneously breaks the discrete time-translational symmetry, resulting i...

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Main Authors: Bhowmick, Dhiman, Sun, Hao, Yang, Bo, Sengupta, Pinaki
Other Authors: School of Physical and Mathematical Sciences
Format: Article
Language:English
Published: 2023
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Online Access:https://hdl.handle.net/10356/171746
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Institution: Nanyang Technological University
Language: English
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spelling sg-ntu-dr.10356-1717462023-11-13T15:35:07Z Discrete time crystal made of topological edge magnons Bhowmick, Dhiman Sun, Hao Yang, Bo Sengupta, Pinaki School of Physical and Mathematical Sciences Science::Physics Discrete Time Magnons We report the emergence of time-crystalline behavior in the \pi-Berry phase protected edge states of a Heisenberg ferromagnet in the presence of an external driving field. The magnon amplification due to the external field spontaneously breaks the discrete time-translational symmetry, resulting in a discrete time crystal with a period that is twice that of the applied EM field. We discuss the nature and symmetry protection of the time crystalline edge states and their stability against various perturbations that are expected in real quantum magnets. We propose an experimental signature to unambiguously detect the time crystalline behavior and identify two recently discovered quasi-2D magnets as potential hosts. We present a first-of-its-kind realization of time crystals at topological edge states, which can be generalized and extrapolated to other bosonic quasi-particle systems that exhibit parametric pumping and topological edge states. Ministry of Education (MOE) Nanyang Technological University National Research Foundation (NRF) Published version B.Y. would like to acknowledge the support from the Singapore National Research Foundation (NRF) under NRF Fellowship Award No. NRF-NRFF12-2020-0005 and a Nanyang Technological University start-up grant (NTU-SUG). D.B. and P.S. acknowledge financial support from the Ministry of Education, Singapore through Grant No. MOE2019-T2-2-119. 2023-11-07T01:01:58Z 2023-11-07T01:01:58Z 2023 Journal Article Bhowmick, D., Sun, H., Yang, B. & Sengupta, P. (2023). Discrete time crystal made of topological edge magnons. Physical Review B, 108(1), 014434-1-014434-12. https://dx.doi.org/10.1103/PhysRevB.108.014434 1098-0121 https://hdl.handle.net/10356/171746 10.1103/PhysRevB.108.014434 2-s2.0-85166967148 1 108 014434-1 014434-12 en NRF-NRFF12-2020-0005 MOE2019-T2-2-119 Physical Review B © 2023 American Physical Society. All rights reserved. This article may be downloaded for personal use only. Any other use requires prior permission of the copyright holder. The Version of Record is available online at http://doi.org/10.1103/PhysRevB.108.014434 application/pdf
institution Nanyang Technological University
building NTU Library
continent Asia
country Singapore
Singapore
content_provider NTU Library
collection DR-NTU
language English
topic Science::Physics
Discrete Time
Magnons
spellingShingle Science::Physics
Discrete Time
Magnons
Bhowmick, Dhiman
Sun, Hao
Yang, Bo
Sengupta, Pinaki
Discrete time crystal made of topological edge magnons
description We report the emergence of time-crystalline behavior in the \pi-Berry phase protected edge states of a Heisenberg ferromagnet in the presence of an external driving field. The magnon amplification due to the external field spontaneously breaks the discrete time-translational symmetry, resulting in a discrete time crystal with a period that is twice that of the applied EM field. We discuss the nature and symmetry protection of the time crystalline edge states and their stability against various perturbations that are expected in real quantum magnets. We propose an experimental signature to unambiguously detect the time crystalline behavior and identify two recently discovered quasi-2D magnets as potential hosts. We present a first-of-its-kind realization of time crystals at topological edge states, which can be generalized and extrapolated to other bosonic quasi-particle systems that exhibit parametric pumping and topological edge states.
author2 School of Physical and Mathematical Sciences
author_facet School of Physical and Mathematical Sciences
Bhowmick, Dhiman
Sun, Hao
Yang, Bo
Sengupta, Pinaki
format Article
author Bhowmick, Dhiman
Sun, Hao
Yang, Bo
Sengupta, Pinaki
author_sort Bhowmick, Dhiman
title Discrete time crystal made of topological edge magnons
title_short Discrete time crystal made of topological edge magnons
title_full Discrete time crystal made of topological edge magnons
title_fullStr Discrete time crystal made of topological edge magnons
title_full_unstemmed Discrete time crystal made of topological edge magnons
title_sort discrete time crystal made of topological edge magnons
publishDate 2023
url https://hdl.handle.net/10356/171746
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