Title: Deconstructing magnetization noise: Degeneracies, phases, and mobile fractionalized excitations in tetris artificial spin ice

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.

Authors:

Goryca, Mateusz  ^[1];

• Search DOE PAGES for author "Goryca, Mateusz"
• Search DOE PAGES for ORCID "0000-0001-7582-1880"

Zhang, Xiaoyu ^[2]; Ramberger, Justin ^[3]; Watts, Justin D. ^[4]; Nisoli, Cristiano  ^[5];

• Search DOE PAGES for author "Nisoli, Cristiano"
• Search DOE PAGES for ORCID "0000-0003-0053-1023"

Leighton, Chris  ^[3];

• Search DOE PAGES for author "Leighton, Chris"
• Search DOE PAGES for ORCID "0000-0003-2492-0816"

Schiffer, Peter  ^[6];

• Search DOE PAGES for author "Schiffer, Peter"
• Search DOE PAGES for ORCID "0000-0002-6430-6549"

Crooker, Scott A. ^[7]

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+ Show Author Affiliations

1. National High Magnetic Field Lab, Los Alamos National Laboratory, Los Alamos, NM 87545, Institute of Experimental Physics, Faculty of Physics, University of Warsaw, Warsaw 02-093, Poland
2. Department of Applied Physics, Yale University, New Haven, CT 06520
3. Department of Chemical Engineering and Materials Science, University of Minnesota, Minneapolis, MN 55455
4. Department of Chemical Engineering and Materials Science, University of Minnesota, Minneapolis, MN 55455, School of Physics and Astronomy, University of Minnesota, Minneapolis, MN 55455
5. Theoretical Division, Los Alamos National Laboratory, Los Alamos, NM 87545
6. Department of Applied Physics, Yale University, New Haven, CT 06520, Department of Physics, Yale University, New Haven, CT 06520
7. National High Magnetic Field Lab, Los Alamos National Laboratory, Los Alamos, NM 87545

Publication Date:

Wed Oct 18 00:00:00 EDT 2023

Research Org.:

Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)

Sponsoring Org.:

USDOE Laboratory Directed Research and Development (LDRD) Program; National Science Foundation (NSF); USDOE Office of Science (SC), Basic Energy Sciences (BES). Materials Sciences & Engineering Division (MSE); Norwegian Financial Mechanism; Polish National Agency for Academic Exchange

OSTI Identifier:

2202870

Alternate Identifier(s):

OSTI ID: 2205067

Report Number(s):

LA-UR-23-30254
Journal ID: ISSN 0027-8424; e2310777120

Grant/Contract Number:  

SC0020162; Quantum Science Center; 89233218CNA000001; DMR-2103711; 2020/37/K/ST3/03656; PPN/PPO/2020/1/00030

Resource Type:

Published Article

Journal Name:

Proceedings of the National Academy of Sciences of the United States of America

Additional Journal Information:

Journal Name: Proceedings of the National Academy of Sciences of the United States of America Journal Volume: 120 Journal Issue: 43; Journal ID: ISSN 0027-8424

Publisher:

Proceedings of the National Academy of Sciences

Country of Publication:

United States

Language:

English

Subject:

71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; High Magnetic Field Science; Artificial spin ice; Monopoles; Noise; Frustrated magnetism; Fractionalized excitation