Example：10.1021/acsami.1c06204 or Chem. Rev., 2007, 107, 2411-2502
Efficient Slave-Boson Approach for Multiorbital Two-Particle Response Functions and Superconductivity Physical Review X (IF15.762), Pub Date : 2021-11-29, DOI: 10.1103/physrevx.11.041040 Tsung-Han Lee, Nicola Lanatà, Minjae Kim, Gabriel Kotliar
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 -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 particle-particle 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 -wave pairing instability before entering Hund’s regime. Our approach paves the way for investigating the pairing mechanism in realistic correlated materials.