Publication Date:
2017-09-06
Description:
Author(s): J. Vučičević, T. Ayral, and O. Parcollet In high-temperature superconductors, the superconductivity appears on the verge of Mott localization and is mediated by collective electronic excitations. Here, the authors present a general theoretical framework (TRILEX) that combines the ideas of DMFT and spin-fluctuation theory, and is shown to capture both the d -wave superconductivity and the Mott insulating phase in the Hubbard model. The emphasis is laid on the local scattering between the electrons and the effective long-range bosonic degrees of freedom. The renormalized electron-boson vertex is obtained from a quantum Monte Carlo solution of a self-consistent single-impurity effective model. Therefore, the calculation is of significantly lighter weight compared to the minimal cluster DMFT required for the same purpose. Additionally, both the level and flavor of the approximation are variable, in a fully controlled manner. [Phys. Rev. B 96, 104504] Published Tue Sep 05, 2017
Keywords:
Superfluidity and superconductivity
Print ISSN:
1098-0121
Electronic ISSN:
1095-3795
Topics:
Physics
