Preprint
Observation and manipulation of chiral phasons in a magnetic system
- Abstract:
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Phasons, quasiparticle excitations corresponding to phase shifts in incommensurate orders, represent the lowest-energy Goldstone modes of such systems, yet have remained unobserved in magnetic materials. Here, we activate the Goldstone mode of a one-dimensional chiral spin helix in a helimagnet by exploiting nonlinear spin dynamics, revealing an Archimedean screw-like phason mode at megahertz frequencies. This unique phase-sliding behavior is directly evidenced through a Doppler-shift signature detected via stroboscopic magneto-optical Kerr effect measurements. Remarkably, owing to the intrinsic screw symmetry of the system, forward- and backward-propagating phasons can be selectively excited, demonstrating well-defined mode chirality. Our results unveil a novel pumping mechanism in magnetic materials and establish a tunable experimental platform for the study of Floquet magnetism.
- Publication status:
- Published
- Peer review status:
- Not peer reviewed
Actions
Access Document
- Files:
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(Preview, Pre-print, pdf, 1.8MB, Terms of use)
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- Preprint server copy:
- 10.21203/rs.3.rs-7058774/v1
Authors
- Preprint server:
- Research Square
- Publication date:
- 2025-07-29
- DOI:
- EISSN:
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2693-5015
- Server owner:
- Research Square Company
- Language:
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English
- Pubs id:
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2272300
- Local pid:
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pubs:2272300
- Deposit date:
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2025-08-26
Terms of use
- Copyright holder:
- Zhang et al
- Copyright date:
- 2025
- Rights statement:
- ©2025 The Authors. This paper is an open access article distributed under the terms of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/)
- Licence:
- CC Attribution (CC BY)
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