Raman Scattering from Higgs Mode Oscillations in the
Two-Dimensional Antiferromagnet Ca2RuO4

J 2017

Raman Scattering from Higgs Mode Oscillations in the Two-Dimensional Antiferromagnet Ca2RuO4

SOULIOU, S.M., Jiří CHALOUPKA, G. KHALIULLIN, G. RYU, A. JAIN et. al.

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

Language

English

Type of outcome

Článek v odborném periodiku

Field of Study

10302 Condensed matter physics

Country of publisher

United States of America

Confidentiality degree

není předmětem státního či obchodního tajemství

References:

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

Abstract

V originále

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.

Links

GJ15-14523Y, research and development project

Name: Mikroskopické modely magnetismu supravodivých pniktidů železa a vrstevnatých oxidů iridia

LQ1601, research and development project

Name: CEITEC 2020 (Acronym: CEITEC2020)

Investor: Ministry of Education, Youth and Sports of the CR

Citovat

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", 5 pp. ISSN 0031-9007. Available from: https://dx.doi.org/10.1103/PhysRevLett.119.067201.

@article{1403072,
   author = {Souliou, S.M. and Chaloupka, Jiří and Khaliullin, G. and Ryu, G. and Jain, A. and Kim, B.J. and Le Tacon, M. and Keimer, B.},
   article_location = {COLLEGE PK, MD USA},
   article_number = {6},
   doi = {http://dx.doi.org/10.1103/PhysRevLett.119.067201},
   keywords = {ruthenates; Raman scattering; magnetic model; magnon; amplitude mode},
   language = {eng},
   issn = {0031-9007},
   journal = {Physical Review Letters},
   title = {Raman Scattering from Higgs Mode Oscillations in the Two-Dimensional Antiferromagnet Ca2RuO4},
   url = {https://journals.aps.org/prl/abstract/10.1103/PhysRevLett.119.067201},
   volume = {119},
   year = {2017}
}

TY  - JOUR
ID  - 1403072
AU  - Souliou, S.M. - Chaloupka, Jiří - Khaliullin, G. - Ryu, G. - Jain, A. - Kim, B.J. - Le Tacon, M. - Keimer, B.
PY  - 2017
TI  - Raman Scattering from Higgs Mode Oscillations in the Two-Dimensional Antiferromagnet Ca2RuO4
JF  - Physical Review Letters
VL  - 119
IS  - 6
SP  - "067201-1"-"067201-5"
EP  - "067201-1"-"067201-5"
PB  - The Americal Physical Society
SN  - 00319007
KW  - ruthenates
KW  - Raman scattering
KW  - magnetic model
KW  - magnon
KW  - amplitude mode
UR  - https://journals.aps.org/prl/abstract/10.1103/PhysRevLett.119.067201
L2  - https://journals.aps.org/prl/abstract/10.1103/PhysRevLett.119.067201
N2  - 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.
ER  -

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. \textit{Physical Review Letters}. COLLEGE PK, MD USA: The Americal Physical Society, 2017, vol.~119, No~6, p.~''067201-1''-''067201-5'', 5 pp. ISSN~0031-9007. Available from: https://dx.doi.org/10.1103/PhysRevLett.119.067201.

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