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.

Základní údaje

Originální název

Collective Modes in Excitonic Magnets: Dynamical Mean-Field Study

Autoři

GEFFROY, Dominique Alain; J. KAUFMANN; A. HARIKI; P. GUNACKER; A. HAUSOEL a J. KUNES

Vydání

Physical Review Letters, COLLEGE PK, The American Physical Society, 2019, 0031-9007

Další údaje

Jazyk

angličtina

Typ výsledku

Článek v odborném periodiku

Obor

10302 Condensed matter physics

Stát vydavatele

Spojené státy

Utajení

není předmětem státního či obchodního tajemství

Odkazy

URL

Impakt faktor

Impact factor: 8.385

Označené pro přenos do RIV

Ano

Kód RIV

RIV/00216224:14310/19:00113514

Organizační jednotka

Přírodovědecká fakulta

Klíčová slova anglicky

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

Štítky

H20, rivok

Příznaky

Mezinárodní význam, Recenzováno

Změněno: 2. 4. 2020 12:46, Mgr. Marie Novosadová Šípková, DiS.

Anotace

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 a J. KUNES. Collective Modes in Excitonic Magnets: Dynamical Mean-Field Study. Physical Review Letters. COLLEGE PK: The American Physical Society, 2019, roč. 122, č. 12, s. 1-6. ISSN 0031-9007. Dostupné z: https://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 = {https://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 a J. KUNES. Collective Modes in Excitonic Magnets: Dynamical Mean-Field Study. \textit{Physical Review Letters}. COLLEGE PK: The American Physical Society, 2019, roč.~122, č.~12, s.~1-6. ISSN~0031-9007. Dostupné z: https://doi.org/10.1103/PhysRevLett.122.127601.

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