Role of vertex corrections in the matrix formulation of the random phase approximation for the multiorbital Hubbard model
Journal Article
·
· Physical Review B
- Goethe-Univ. Frankfurt, Frankfurt am Main (Germany)
- Univ. of Florida, Gainesville, FL (United States)
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
- Univ. of California, Santa Barbara, CA (United States)
In the framework of a multiorbital Hubbard model description of superconductivity, a matrix formulation of the superconducting pairing interaction that has been widely used is designed to treat spin, charge, and orbital fluctuations within a random phase approximation (RPA). In terms of Feynman diagrams, this takes into account particle-hole ladder and bubble contributions as expected. It turns out, however, that this matrix formulation also generates additional terms which have the diagrammatic structure of vertex corrections. Furthermore we examine these terms and discuss the relationship between the matrix-RPA superconducting pairing interaction and the Feynman diagrams that it sums.
- Research Organization:
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC)
- Grant/Contract Number:
- AC05-00OR22725; FG02-05ER46236
- OSTI ID:
- 1399530
- Alternate ID(s):
- OSTI ID: 1336968
- Journal Information:
- Physical Review B, Vol. 94, Issue 21; ISSN 2469-9950
- Publisher:
- American Physical Society (APS)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
Cited by: 10 works
Citation information provided by
Web of Science
Web of Science
Orbital selective pairing and gap structures of iron-based superconductors
|
journal | May 2017 |
Similar Records
Pairing in the two-dimensional Hubbard model from weak to strong coupling
Dynamical vertex approximation for many-electron systems with spontaneously broken SU(2) symmetry
Neutron and ARPES constraints on the couplings of the multiorbital Hubbard model for the iron pnictides
Journal Article
·
Fri Jan 31 00:00:00 EST 2020
· Physical Review Research
·
OSTI ID:1399530
+3 more
Dynamical vertex approximation for many-electron systems with spontaneously broken SU(2) symmetry
Journal Article
·
Thu Aug 12 00:00:00 EDT 2021
· Physical Review. B
·
OSTI ID:1399530
Neutron and ARPES constraints on the couplings of the multiorbital Hubbard model for the iron pnictides
Journal Article
·
Fri Jan 01 00:00:00 EST 2010
· Physical Review B
·
OSTI ID:1399530
+4 more