Magnetic field control over the axial character of Higgs modes in charge-density wave compounds

Dirk Wulferding (), Jongho Park, Takami Tohyama, Seung Ryong Park and Changyoung Kim ()
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Dirk Wulferding: Seoul National University
Jongho Park: Seoul National University
Takami Tohyama: Tokyo University of Science
Seung Ryong Park: Incheon National University
Changyoung Kim: Seoul National University

Nature Communications, 2025, vol. 16, issue 1, 1-7

Abstract: Abstract Understanding how symmetry-breaking processes generate order out of disorder is among the most fundamental problems of nature. The scalar Higgs mode – a massive (quasi-) particle – is a key ingredient in these processes and emerges with the spontaneous breaking of a continuous symmetry. Its related exotic and elusive axial counterpart, a Boson with vector character, can be stabilized through the simultaneous breaking of multiple continuous symmetries. Here, we employ a magnetic field to tune the recently discovered axial Higgs-type charge-density wave amplitude modes in rare-earth tritellurides. We demonstrate a proportionality between the axial Higgs component and the applied field, and a 90° phase shift upon changing the direction of the magnetic field. This indicates that the axial character is directly related to magnetic degrees of freedom. Our approach opens up an in-situ control over the axial character of emergent Higgs modes.

Date: 2025
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DOI: 10.1038/s41467-024-55355-y

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