Abstract
Direct detection of spontaneous spin fluctuations, or “magnetization noise,” is emerging as a powerful means of revealing and studying magnetic excitations in both natural and artificial frustrated magnets. Depending on the lattice and nature of the frustration, these excitations can often be described as fractionalized quasiparticles possessing an effective magnetic charge. Here, by combining ultrasensitive optical detection of thermodynamic magnetization noise with Monte Carlo simulations, we reveal emergent regimes of magnetic excitations in artificial “tetris ice.” A marked increase of the intrinsic noise at certain applied magnetic fields heralds the spontaneous proliferation of fractionalized excitations, which can diffuse independently, without cost in energy, along specific quasi-1D spin chains in the tetris ice lattice.
Original language | English (US) |
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Article number | e2310777120 |
Journal | Proceedings of the National Academy of Sciences of the United States of America |
Volume | 120 |
Issue number | 43 |
DOIs | |
State | Published - 2023 |
Bibliographical note
Publisher Copyright:Copyright © 2023 the Author(s). Published by PNAS. This article is distributed under Creative Commons Attribution-NonCommercial-NoDerivatives License 4.0 (CC BY-NC-ND).
Keywords
- artificial spin ice
- fractionalized excitation
- frustrated magnetism
- monopoles
- noise
PubMed: MeSH publication types
- Journal Article