Higgs mode and its decay in a two-dimensional antiferromagnet

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216224%3A14740%2F17%3A00094849" target="_blank" >RIV/00216224:14740/17:00094849 - isvavai.cz</a>

Result on the web

<a href="http://www.nature.com/nphys/journal/v13/n7/full/nphys4077.html" target="_blank" >http://www.nature.com/nphys/journal/v13/n7/full/nphys4077.html</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1038/NPHYS4077" target="_blank" >10.1038/NPHYS4077</a>

Result language

angličtina

Original language name

Higgs mode and its decay in a two-dimensional antiferromagnet

Original language description

Condensed-matter analogues of the Higgs boson in particle physics allow insights into its behaviour in different symmetries and dimensionalities(1). Evidence for the Higgs mode has been reported in a number of different settings, including ultracold atomic gases(2), disordered superconductors(3), and dimerized quantum magnets(4). However, decay processes of the Higgsmode(which are eminently important in particlephysics) have not yet been studied in condensed matter due to the lack of a suitable material system coupled to a direct experimental probe. A quantitative understanding of these processes is particularly important for low-dimensional systems, where the Higgs mode decays rapidly and has remained elusive to most experimental probes. Here, we discover and study the Higgs mode in a two-dimensional antiferromagnet using spin-polarized inelastic neutron scattering. Our spin-wave spectra of Ca2RuO4 directly reveal a well-defined, dispersive Higgs mode, which quickly decays into transverse Goldstone modes at the antiferromagnetic ordering wavevector. Through a complete mapping of the transverse modes in the reciprocal space, we uniquely specify the minimal model Hamiltonian and describe the decay process. We thus establish a novel condensed-matter platform for research on the dynamics of the Higgs mode.

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

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OECD FORD branch

10302 - Condensed matter physics (including formerly solid state physics, supercond.)

Project

Result was created during the realization of more than one project. More information in the Projects tab.

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year

2017

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Nature Physics

ISSN

1745-2473

e-ISSN

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Volume of the periodical

13

Issue of the periodical within the volume

7

Country of publishing house

GB - UNITED KINGDOM

Number of pages

6

Pages from-to

633-637

UT code for WoS article

000404629900008

EID of the result in the Scopus database

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