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Efficient Slave-Bos...
Efficient Slave-Boson Approach for Multiorbital Two-Particle Response Functions and Superconductivity
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- Lee, Tsung-Han (författare)
- Rutgers State Univ, Dept Phys & Astron, Piscataway, NJ 08854 USA.
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- Lanata, Nicola (författare)
- Stockholms universitet,Nordiska institutet för teoretisk fysik (Nordita),Aarhus University, Denmark,Nordita SU
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- Kim, Minjae (författare)
- Rutgers State Univ, Dept Phys & Astron, Piscataway, NJ 08854 USA.;Pohang Univ Sci & Technol POSTECH, Dept Chem, Pohang 37673, South Korea.
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- Kotliar, Gabriel (författare)
- Rutgers State Univ, Dept Phys & Astron, Piscataway, NJ 08854 USA.;Brookhaven Natl Lab, Condensed Matter Phys & Mat Sci Dept, Upton, NY 11973 USA.
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Rutgers State Univ, Dept Phys & Astron, Piscataway, NJ 08854 USA Nordiska institutet för teoretisk fysik (Nordita) (creator_code:org_t)
- AMER PHYSICAL SOC, 2021
- 2021
- Engelska.
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Ingår i: Physical Review X. - : AMER PHYSICAL SOC. - 2160-3308. ; 11:4
- Relaterad länk:
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https://doi.org/10.1...
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https://urn.kb.se/re...
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https://doi.org/10.1...
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https://urn.kb.se/re...
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Abstract
Ämnesord
Stäng
- 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.
Ämnesord
- NATURVETENSKAP -- Fysik -- Den kondenserade materiens fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Condensed Matter Physics (hsv//eng)
- NATURVETENSKAP -- Fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences (hsv//eng)
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