Collective Modes in Excitonic Magnets: Dynamical Mean-Field
Study

J 2019

Collective Modes in Excitonic Magnets: Dynamical Mean-Field Study

GEFFROY, Dominique Alain, J. KAUFMANN, A. HARIKI, P. GUNACKER, A. HAUSOEL et. al.

Basic information

Original name

Collective Modes in Excitonic Magnets: Dynamical Mean-Field Study

Authors

GEFFROY, Dominique Alain (250 France, guarantor, belonging to the institution), J. KAUFMANN, A. HARIKI, P. GUNACKER, A. HAUSOEL and J. KUNES

Edition

Physical Review Letters, COLLEGE PK, The American Physical Society, 2019, 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: 8.385

RIV identification code

RIV/00216224:14310/19:00113514

Organization unit

Faculty of Science

DOI

http://dx.doi.org/10.1103/PhysRevLett.122.127601

UT WoS

000462936100014

Keywords in English

ELECTRONIC-STRUCTURE CALCULATIONS; ANALYTIC CONTINUATION; MAXIMUM-ENTROPY; HUBBARD-MODEL; HIGGS MODE; QUANTUM; SYSTEMS; PHASE; ORDER

Abstract

V originále

We present a dynamical mean-field study of dynamical susceptibilities in the two-band Hubbard model. Varying the model parameters we analyze the two-particle excitations in the normal as well as in the ordered phase, an excitonic condensate. The two-particle dynamical mean-field theory spectra in the ordered phase reveal the gapless Goldstone modes arising from spontaneous breaking of continuous symmetries. We also observe the gapped Higgs mode, characterized by vanishing of the gap at the phase boundary. Qualitative changes observed in the spin susceptibility can be used as an experimental probe to identify the excitonic condensation.

Citovat

GEFFROY, Dominique Alain, J. KAUFMANN, A. HARIKI, P. GUNACKER, A. HAUSOEL and J. KUNES. Collective Modes in Excitonic Magnets: Dynamical Mean-Field Study. Physical Review Letters. COLLEGE PK: The American Physical Society, 2019, vol. 122, No 12, p. 1-6. ISSN 0031-9007. Available from: https://dx.doi.org/10.1103/PhysRevLett.122.127601.

@article{1642137,
   author = {Geffroy, Dominique Alain and Kaufmann, J. and Hariki, A. and Gunacker, P. and Hausoel, A. and Kunes, J.},
   article_location = {COLLEGE PK},
   article_number = {12},
   doi = {http://dx.doi.org/10.1103/PhysRevLett.122.127601},
   keywords = {ELECTRONIC-STRUCTURE CALCULATIONS; ANALYTIC CONTINUATION; MAXIMUM-ENTROPY; HUBBARD-MODEL; HIGGS MODE; QUANTUM; SYSTEMS; PHASE; ORDER},
   language = {eng},
   issn = {0031-9007},
   journal = {Physical Review Letters},
   title = {Collective Modes in Excitonic Magnets: Dynamical Mean-Field Study},
   url = {https://journals.aps.org/prl/abstract/10.1103/PhysRevLett.122.127601},
   volume = {122},
   year = {2019}
}

TY  - JOUR
ID  - 1642137
AU  - Geffroy, Dominique Alain - Kaufmann, J. - Hariki, A. - Gunacker, P. - Hausoel, A. - Kunes, J.
PY  - 2019
TI  - Collective Modes in Excitonic Magnets: Dynamical Mean-Field Study
JF  - Physical Review Letters
VL  - 122
IS  - 12
SP  - 1-6
EP  - 1-6
PB  - The American Physical Society
SN  - 00319007
KW  - ELECTRONIC-STRUCTURE CALCULATIONS
KW  - ANALYTIC CONTINUATION
KW  - MAXIMUM-ENTROPY
KW  - HUBBARD-MODEL
KW  - HIGGS MODE
KW  - QUANTUM
KW  - SYSTEMS
KW  - PHASE
KW  - ORDER
UR  - https://journals.aps.org/prl/abstract/10.1103/PhysRevLett.122.127601
L2  - https://journals.aps.org/prl/abstract/10.1103/PhysRevLett.122.127601
N2  - We present a dynamical mean-field study of dynamical susceptibilities in the two-band Hubbard model. Varying the model parameters we analyze the two-particle excitations in the normal as well as in the ordered phase, an excitonic condensate. The two-particle dynamical mean-field theory spectra in the ordered phase reveal the gapless Goldstone modes arising from spontaneous breaking of continuous symmetries. We also observe the gapped Higgs mode, characterized by vanishing of the gap at the phase boundary. Qualitative changes observed in the spin susceptibility can be used as an experimental probe to identify the excitonic condensation.
ER  -

GEFFROY, Dominique Alain, J. KAUFMANN, A. HARIKI, P. GUNACKER, A. HAUSOEL and J. KUNES. Collective Modes in Excitonic Magnets: Dynamical Mean-Field Study. \textit{Physical Review Letters}. COLLEGE PK: The American Physical Society, 2019, vol.~122, No~12, p.~1-6. ISSN~0031-9007. Available from: https://dx.doi.org/10.1103/PhysRevLett.122.127601.

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