SOULIOU, S.M., Jiří CHALOUPKA, G. KHALIULLIN, G. RYU, A. JAIN, B.J. KIM, M. LE TACON and B. KEIMER. Raman Scattering from Higgs Mode Oscillations in the Two-Dimensional Antiferromagnet Ca2RuO4. Physical Review Letters, COLLEGE PK, MD USA: The Americal Physical Society, 2017, vol. 119, No 6, p. "067201-1"-"067201-5". ISSN 0031-9007. doi:10.1103/PhysRevLett.119.067201.
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Basic information
Original name Raman Scattering from Higgs Mode Oscillations in the Two-Dimensional Antiferromagnet Ca2RuO4
Authors SOULIOU, S.M. (300 Greece), Jiří CHALOUPKA (203 Czech Republic, guarantor, belonging to the institution), G. KHALIULLIN (643 Russian Federation), G. RYU (410 Republic of Korea), A. JAIN (356 India), B.J. KIM (410 Republic of Korea), M. LE TACON (250 France) and B. KEIMER (276 Germany).
Edition Physical Review Letters, COLLEGE PK, MD USA, The Americal Physical Society, 2017, 0031-9007.
Other information
Original language English
Type of outcome article in a journal
Field of Study 10302 Condensed matter physics
Country of publisher United States of America
Confidentiality degree is not subject to a state or trade secret
WWW URL
Impact factor Impact factor: 8.839
RIV identification code RIV/00216224:14310/17:00095388
Organization unit Faculty of Science
Doi http://dx.doi.org/10.1103/PhysRevLett.119.067201
UT WoS 000407100100014
Keywords in English ruthenates; Raman scattering; magnetic model; magnon; amplitude mode
Tags NZ, rivok
Tags International impact, Reviewed
Changed by Changed by: Ing. Nicole Zrilić, učo 240776. Changed: 11/4/2018 11:04.
Abstract
We present and analyze Raman spectra of the Mott insulator Ca2RuO4, whose quasi-two-dimensional antiferromagnetic order has been described as a condensate of low-lying spin-orbit excitons with angular momentum J(eff) = 1. In the A(g) polarization geometry, the amplitude (Higgs) mode of the spin-orbit condensate is directly probed in the scalar channel, thus avoiding infrared-singular magnon contributions. In the B-1g geometry, we observe a single-magnon peak as well as two-magnon and two-Higgs excitations. Model calculations using exact diagonalization quantitatively agree with the observations. Together with recent neutron scattering data, our study provides strong evidence for excitonic magnetism in Ca2RuO4 and points out new perspectives for research on the Higgs mode in two dimensions.
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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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