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Efficient Slave-Bos...
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Lee, Tsung-HanRutgers State Univ, Dept Phys & Astron, Piscataway, NJ 08854 USA.
(författare)
Efficient Slave-Boson Approach for Multiorbital Two-Particle Response Functions and Superconductivity
- Artikel/kapitelEngelska2021
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AMER PHYSICAL SOC,2021
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LIBRIS-ID:oai:DiVA.org:kth-306580
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https://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-306580URI
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https://doi.org/10.1103/PhysRevX.11.041040DOI
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https://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-200681URI
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Språk:engelska
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Sammanfattning på:engelska
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Nordita SUQC 20211220
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We develop an efficient approach for computing two-particle response functions and interaction vertices for multiorbital strongly correlated systems based on the rotationally invariant slave-boson framework. The method is applied to the degenerate three-orbital Hubbard-Kanamori model for investigating the origin of the s-wave orbital antisymmetric spin-triplet superconductivity in Hund's metal regime, previously found in the dynamical mean-field theory studies. By computing the pairing interaction considering the particleparticle and the particle-hole scattering channels, we identify the mechanism leading to the pairing instability around Hund's metal crossover arises from the particle-particle channel, which contains the local electron pair fluctuation between different particle-number sectors of the atomic Hilbert space. On the other hand, the particle-hole spin fluctuations induce the s-wave pairing instability before entering Hund's regime. Our approach paves the way for investigating the pairing mechanism in realistic correlated materials.
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Lanata, NicolaStockholms universitet,Nordiska institutet för teoretisk fysik (Nordita),Aarhus University, Denmark,Nordita SU(Swepub:su)nila2849
(författare)
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Kim, MinjaeRutgers State Univ, Dept Phys & Astron, Piscataway, NJ 08854 USA.;Pohang Univ Sci & Technol POSTECH, Dept Chem, Pohang 37673, South Korea.
(författare)
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Kotliar, GabrielRutgers State Univ, Dept Phys & Astron, Piscataway, NJ 08854 USA.;Brookhaven Natl Lab, Condensed Matter Phys & Mat Sci Dept, Upton, NY 11973 USA.
(författare)
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Rutgers State Univ, Dept Phys & Astron, Piscataway, NJ 08854 USA.Nordiska institutet för teoretisk fysik (Nordita)
(creator_code:org_t)
Sammanhörande titlar
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Ingår i:Physical Review X: AMER PHYSICAL SOC11:42160-3308
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