Orbital-dependent correlations in PuCoGa$_5$
ORAL
Abstract
Among the group of Pu-based compounds, PuCoGa$_5$ has attracted major interest since its superconductivity develops at
$T_{c}$ = 18.5 K, which is the record transition temperature among the family of heavy fermion superconductors.
More recently, It has been conjectured [1] that there is a connection between superconductivity and orbital differentiation,
which is a key concept to understand the physics of ruthenates and iron-based superconductors.
In this study we investigate the orbital-dependence of correlations in PuCoGa$_5$ as a function of temperature. In particular,
we employed the combination of density functional theory (DFT) and dynamical mean field theory and the DFT+Gutzwiller$/$rotationally invariant slave boson method.
According to our calculations there is a strong tendency of the orbitals to differentiate in PuCoGa$_5$ at low temperatures.
In particular, both methods suggest that electronic correlations remove the Pu-5$f_{7/2}$ spectral weight from the Fermi level relative to DFT.
[1] L. de' Medici, Phys. Rev. Lett. 118, 167003 (2017).
$T_{c}$ = 18.5 K, which is the record transition temperature among the family of heavy fermion superconductors.
More recently, It has been conjectured [1] that there is a connection between superconductivity and orbital differentiation,
which is a key concept to understand the physics of ruthenates and iron-based superconductors.
In this study we investigate the orbital-dependence of correlations in PuCoGa$_5$ as a function of temperature. In particular,
we employed the combination of density functional theory (DFT) and dynamical mean field theory and the DFT+Gutzwiller$/$rotationally invariant slave boson method.
According to our calculations there is a strong tendency of the orbitals to differentiate in PuCoGa$_5$ at low temperatures.
In particular, both methods suggest that electronic correlations remove the Pu-5$f_{7/2}$ spectral weight from the Fermi level relative to DFT.
[1] L. de' Medici, Phys. Rev. Lett. 118, 167003 (2017).
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Presenters
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Walber Hugo De Brito
Brookhaven National Laboratory
Authors
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Walber Hugo De Brito
Brookhaven National Laboratory
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Sangkook Choi
Condensed Matter Physics and Materials Science Department, Brookhaven National Laboratory, Brookhaven National Laboratory
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Gabriel Kotliar
CMPMS, Brookhaven national lab, Department of Physics and Astronomy, Rutgers University, Department of Physics and Astronomy, Rutgers University, Piscataway, New Jersey 08856, USA, Condensed Matter Physics and Materials Science Department, Brookhaven National Laboratory, Rutgers University, Condensed Matter Physics and Materials Science Department, Brookhaven National Lab, Physics and Astronomy Department, Rutgers University, Physics and Astronomy, rutgers university