Higgs mode and its decay in a two-dimensional antiferromagnet

A. Jain; M. Krautloher; J. Porras; G. H. Ryu; D. P. Chen; D. L. Abernathy; J. T. Park; A. Ivanov; J. Chaloupka; G. Khaliullin; B. Keimer; B. J. Kim

doi:10.1038/nphys4077

Higgs mode and its decay in a two-dimensional antiferromagnet

A. Jain, M. Krautloher, J. Porras, G. H. Ryu, D. P. Chen, D. L. Abernathy, J. T. Park, A. Ivanov, J. Chaloupka, G. Khaliullin, B. Keimer, B. J. Kim

Direct Geometry

Research output: Contribution to journal › Article › peer-review

138 Scopus citations

Abstract

Condensed-matter analogues of the Higgs boson in particle physics allow insights into its behaviour in different symmetries and dimensionalities. Evidence for the Higgs mode has been reported in a number of different settings, including ultracold atomic gases, disordered superconductors, and dimerized quantum magnets. However, decay processes of the Higgs mode (which are eminently important in particle physics) 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 Ca 2 RuO 4 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.

Original language	English
Pages (from-to)	633-637
Number of pages	5
Journal	Nature Physics
Volume	13
Issue number	7
DOIs	https://doi.org/10.1038/nphys4077
State	Published - Jul 1 2017

Funding

We acknowledge financial support from the German Science Foundation (DFG) via the coordinated research programme SFB-TRR80, and from the European Research Council via Advanced Grant 669550 (Com4Com). The experiments at Oak Ridge National Laboratory's Spallation Neutron Source were sponsored by the Division of Scientific User Facilities, US DOE Oce of Basic Energy Sciences. J.C. was supported by GACR (project no. GJ15-14523Y) and by MSMT CR under NPU II project CEITEC 2020 (LQ1601). We acknowledge financial support from the German Science Foundation (DFG) via the coordinated research programme SFB-TRR80, and from the European Research Council via Advanced Grant 669550 (Com4Com). The experiments at Oak Ridge National Laboratory’s Spallation Neutron Source were sponsored by the Division of Scientific User Facilities, US DOE Office of Basic Energy Sciences. J.C. was supported by GACR (project no. GJ15-14523Y) and by MSMT CR under NPU II project CEITEC 2020 (LQ1601).

Funders	Funder number
CEITEC 2020
DOE Oce of Basic Energy Sciences
Division of Scientific User Facilities
German Science Foundation
J.C.
MSMT	LQ1601
MSMT CR
U.S. Department of Energy
Basic Energy Sciences
Oak Ridge National Laboratory
Horizon 2020 Framework Programme	669550
European Research Council	Com4Com
Deutsche Forschungsgemeinschaft	SFB-TRR80
Grantová Agentura České Republiky	GJ15-14523Y
Northwestern Polytechnical University

Access to Document

10.1038/nphys4077

Cite this

@article{4c9cb1d269c04312b20e9a9c7a4ac3f3,

title = "Higgs mode and its decay in a two-dimensional antiferromagnet",

abstract = "Condensed-matter analogues of the Higgs boson in particle physics allow insights into its behaviour in different symmetries and dimensionalities. Evidence for the Higgs mode has been reported in a number of different settings, including ultracold atomic gases, disordered superconductors, and dimerized quantum magnets. However, decay processes of the Higgs mode (which are eminently important in particle physics) 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 Ca 2 RuO 4 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.",

author = "A. Jain and M. Krautloher and J. Porras and Ryu, {G. H.} and Chen, {D. P.} and Abernathy, {D. L.} and Park, {J. T.} and A. Ivanov and J. Chaloupka and G. Khaliullin and B. Keimer and Kim, {B. J.}",

year = "2017",

month = jul,

day = "1",

doi = "10.1038/nphys4077",

language = "English",

volume = "13",

pages = "633--637",

journal = "Nature Physics",

issn = "1745-2473",

publisher = "Nature Research",

number = "7",

}

TY - JOUR

T1 - Higgs mode and its decay in a two-dimensional antiferromagnet

AU - Jain, A.

AU - Krautloher, M.

AU - Porras, J.

AU - Ryu, G. H.

AU - Chen, D. P.

AU - Abernathy, D. L.

AU - Park, J. T.

AU - Ivanov, A.

AU - Chaloupka, J.

AU - Khaliullin, G.

AU - Keimer, B.

AU - Kim, B. J.

PY - 2017/7/1

Y1 - 2017/7/1

N2 - Condensed-matter analogues of the Higgs boson in particle physics allow insights into its behaviour in different symmetries and dimensionalities. Evidence for the Higgs mode has been reported in a number of different settings, including ultracold atomic gases, disordered superconductors, and dimerized quantum magnets. However, decay processes of the Higgs mode (which are eminently important in particle physics) 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 Ca 2 RuO 4 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.

AB - Condensed-matter analogues of the Higgs boson in particle physics allow insights into its behaviour in different symmetries and dimensionalities. Evidence for the Higgs mode has been reported in a number of different settings, including ultracold atomic gases, disordered superconductors, and dimerized quantum magnets. However, decay processes of the Higgs mode (which are eminently important in particle physics) 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 Ca 2 RuO 4 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.

UR - http://www.scopus.com/inward/record.url?scp=85016091874&partnerID=8YFLogxK

U2 - 10.1038/nphys4077

DO - 10.1038/nphys4077

M3 - Article

AN - SCOPUS:85016091874

SN - 1745-2473

VL - 13

SP - 633

EP - 637

JO - Nature Physics

JF - Nature Physics

IS - 7

ER -

Higgs mode and its decay in a two-dimensional antiferromagnet

Abstract

Funding

Access to Document

Other files and links

Fingerprint

Cite this