Orbital-dependent self-energy effects and consequences for the superconducting gap structure in multiorbital correlated electron systems

Research output: Contribution to journal › Journal article › Research › peer-review

Standard

Orbital-dependent self-energy effects and consequences for the superconducting gap structure in multiorbital correlated electron systems. / Bjornson, Kristofer; Kreisel, Andreas; Romer, Astrid T.; Andersen, Brian M.

In: Physical Review B, Vol. 103, No. 2, 024508, 12.01.2021.

Research output: Contribution to journal › Journal article › Research › peer-review

Harvard

Bjornson, K, Kreisel, A, Romer, AT & Andersen, BM 2021, 'Orbital-dependent self-energy effects and consequences for the superconducting gap structure in multiorbital correlated electron systems', Physical Review B, vol. 103, no. 2, 024508. https://doi.org/10.1103/PhysRevB.103.024508

APA

Bjornson, K., Kreisel, A., Romer, A. T., & Andersen, B. M. (2021). Orbital-dependent self-energy effects and consequences for the superconducting gap structure in multiorbital correlated electron systems. Physical Review B, 103(2), [024508]. https://doi.org/10.1103/PhysRevB.103.024508

Vancouver

Bjornson K, Kreisel A, Romer AT, Andersen BM. Orbital-dependent self-energy effects and consequences for the superconducting gap structure in multiorbital correlated electron systems. Physical Review B. 2021 Jan 12;103(2). 024508. https://doi.org/10.1103/PhysRevB.103.024508

Author

Bjornson, Kristofer ; Kreisel, Andreas ; Romer, Astrid T. ; Andersen, Brian M. / Orbital-dependent self-energy effects and consequences for the superconducting gap structure in multiorbital correlated electron systems. In: Physical Review B. 2021 ; Vol. 103, No. 2.

Bibtex

@article{f7a1371202774807abe9cc96d083347e,
title = "Orbital-dependent self-energy effects and consequences for the superconducting gap structure in multiorbital correlated electron systems",
abstract = "We perform a theoretical study of the effects of electronic correlations on the superconducting gap structure of multiband superconductors. In particular, by comparing standard RPA-based spin-fluctuation mediated gap structures to those obtained within the FLEX formalism for an iron-based superconductor, we obtain directly the feedback effects from electron-electron interactions on the momentum-space gap structure. We show how self-energy effects can lead to an orbital inversion of the orbital-resolved spin susceptibility, and thereby invert the hierarchy of the most important orbitals channels for superconducting pairing. This effect has important consequences for the detailed gap variations on the Fermi surface. We expect such self-energy feedback on the pairing gap to be generally relevant for superconductivity in strongly correlated multiorbital systems.",
keywords = "DYNAMICS, MECHANISM, SYMMETRY",
author = "Kristofer Bjornson and Andreas Kreisel and Romer, {Astrid T.} and Andersen, {Brian M.}",
year = "2021",
month = jan,
day = "12",
doi = "10.1103/PhysRevB.103.024508",
language = "English",
volume = "103",
journal = "Physical Review B",
issn = "2469-9950",
publisher = "American Physical Society",
number = "2",

}

RIS

TY - JOUR

T1 - Orbital-dependent self-energy effects and consequences for the superconducting gap structure in multiorbital correlated electron systems

AU - Bjornson, Kristofer

AU - Kreisel, Andreas

AU - Romer, Astrid T.

AU - Andersen, Brian M.

PY - 2021/1/12

Y1 - 2021/1/12

N2 - We perform a theoretical study of the effects of electronic correlations on the superconducting gap structure of multiband superconductors. In particular, by comparing standard RPA-based spin-fluctuation mediated gap structures to those obtained within the FLEX formalism for an iron-based superconductor, we obtain directly the feedback effects from electron-electron interactions on the momentum-space gap structure. We show how self-energy effects can lead to an orbital inversion of the orbital-resolved spin susceptibility, and thereby invert the hierarchy of the most important orbitals channels for superconducting pairing. This effect has important consequences for the detailed gap variations on the Fermi surface. We expect such self-energy feedback on the pairing gap to be generally relevant for superconductivity in strongly correlated multiorbital systems.

AB - We perform a theoretical study of the effects of electronic correlations on the superconducting gap structure of multiband superconductors. In particular, by comparing standard RPA-based spin-fluctuation mediated gap structures to those obtained within the FLEX formalism for an iron-based superconductor, we obtain directly the feedback effects from electron-electron interactions on the momentum-space gap structure. We show how self-energy effects can lead to an orbital inversion of the orbital-resolved spin susceptibility, and thereby invert the hierarchy of the most important orbitals channels for superconducting pairing. This effect has important consequences for the detailed gap variations on the Fermi surface. We expect such self-energy feedback on the pairing gap to be generally relevant for superconductivity in strongly correlated multiorbital systems.

KW - DYNAMICS

KW - MECHANISM

KW - SYMMETRY

U2 - 10.1103/PhysRevB.103.024508

DO - 10.1103/PhysRevB.103.024508

M3 - Journal article

VL - 103

JO - Physical Review B

JF - Physical Review B

SN - 2469-9950

IS - 2

M1 - 024508

ER -

ID: 260407102