JAIN, A., M. KRAUTLOHER, J. PORRAS, G.H. RYU, D.P. CHEN, D.L. ABERNATHY, J.T. PARK, A. IVANOV, Jiří CHALOUPKA, G. KHALIULLIN, B. KEIMER and B.J. KIM. Higgs mode and its decay in a two-dimensional antiferromagnet. Nature Physics, London: Nature Publishing Group, 2017, vol. 13, No 7, p. 633-637. ISSN 1745-2473. doi:10.1038/NPHYS4077.
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Basic information
Original name Higgs mode and its decay in a two-dimensional antiferromagnet
Authors JAIN, A. (356 India), M. KRAUTLOHER (276 Germany), J. PORRAS (840 United States of America), G.H. RYU (156 China), D.P. CHEN (156 China), D.L. ABERNATHY (840 United States of America), J.T. PARK (410 Republic of Korea), A. IVANOV (643 Russian Federation), Jiří CHALOUPKA (203 Czech Republic, guarantor, belonging to the institution), G. KHALIULLIN (643 Russian Federation), B. KEIMER (276 Germany) and B.J. KIM (410 Republic of Korea).
Edition Nature Physics, London, Nature Publishing Group, 2017, 1745-2473.
Other information
Original language English
Type of outcome article in a journal
Field of Study 10302 Condensed matter physics
Country of publisher United Kingdom
Confidentiality degree is not subject to a state or trade secret
WWW URL
Impact factor Impact factor: 22.727
RIV identification code RIV/00216224:14740/17:00094849
Organization unit Central European Institute of Technology
Doi http://dx.doi.org/10.1038/NPHYS4077
UT WoS 000404629900008
Keywords in English quantum magnetism; spin systems; spin-orbit coupling; condensate; spin excitations
Tags rivok
Tags International impact, Reviewed
Changed by Changed by: Mgr. Jiří Chaloupka, Ph.D., učo 53310. Changed: 21/3/2018 15:40.
Abstract
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.
Links
GJ15-14523Y, research and development projectName: Mikroskopické modely magnetismu supravodivých pniktidů železa a vrstevnatých oxidů iridia
LQ1601, research and development projectName: CEITEC 2020 (Acronym: CEITEC2020)
Investor: Ministry of Education, Youth and Sports of the CR, National Feasibility Programme II
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