Dynamical response and competing orders in two-band Hubbard model

NIYAZI, Abuduaini, Dominique Alain GEFFROY and Jan KUNEŠ. Dynamical response and competing orders in two-band Hubbard model. Physical Review B. College PK: The American Physical Society, 2020, vol. 102, No 8, p. 1-9. ISSN 2469-9950. Available from: https://dx.doi.org/10.1103/PhysRevB.102.085159.

Basic information

• Original name: Dynamical response and competing orders in two-band Hubbard model
• Authors: NIYAZI, Abuduaini (guarantor), Dominique Alain GEFFROY (250 France, belonging to the institution) and Jan KUNEŠ.
• Edition: Physical Review B, College PK, The American Physical Society, 2020, 2469-9950.

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: 4.036
• RIV identification code: RIV/00216224:14310/20:00117942
• Organization unit: Faculty of Science
• Doi: http://dx.doi.org/10.1103/PhysRevB.102.085159
• UT WoS: 000564044900007
• Keywords in English: Hubbard Model; Mean-Field Theory; Quantum Monte Carlo
• Tags: rivok
• Tags: International impact, Reviewed

Abstract

We present a dynamical mean-field study of two-particle dynamical response functions in a two-band Hubbard model across several phase transitions. We observe that the transition between the excitonic condensate and spin-state ordered state is continuous with a narrow strip of supersolid phase separating the two. Approaching transition from the excitonic condensate is announced by softening of the excitonic mode at the M point of the Brillouin zone. Inside the spin-state ordered phase there is a magnetically ordered state with 2 x 2 periodicity, which has no precursor in the normal phase.

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