How does momentum-dependent hybridization influence the incorporation of localized f-electron degrees of freedom into the low lying electronic structure of heavy fermion systems?
ORAL
Abstract
How the localized f-electron degrees of freedom incorporate into the Fermi surface is an open question in heavy fermion (HF) physics.
To address this, we examine the archetypal mixed valent material CePd3, whose large Kondo temperature makes it amenable to spectroscopic and theoretical investigation. Prior work has shown good agreement between density functional theory + dynamical mean field theory (DFT+DMFT) calculations and inelastic neutron scattering as well as RIXS measurements, suggesting a local (or momentum-independent) renormalized self-energy [1]. Here we examine the comparison of the single particle spectral function calculated by our DFT+DMFT with our high-resolution angle-resolved photoemission spectroscopy (ARPES). Through this holistic approach we have unambiguously determined the role momentum-dependent hybridization plays on the incorporation of the localized degrees of freedom into the low-lying electronic structure for CePd3.
[1] Rahn, M.C., Kummer, K., Hariki, A. et al. Nat Commun 13, 6129 (2022)
To address this, we examine the archetypal mixed valent material CePd3, whose large Kondo temperature makes it amenable to spectroscopic and theoretical investigation. Prior work has shown good agreement between density functional theory + dynamical mean field theory (DFT+DMFT) calculations and inelastic neutron scattering as well as RIXS measurements, suggesting a local (or momentum-independent) renormalized self-energy [1]. Here we examine the comparison of the single particle spectral function calculated by our DFT+DMFT with our high-resolution angle-resolved photoemission spectroscopy (ARPES). Through this holistic approach we have unambiguously determined the role momentum-dependent hybridization plays on the incorporation of the localized degrees of freedom into the low-lying electronic structure for CePd3.
[1] Rahn, M.C., Kummer, K., Hariki, A. et al. Nat Commun 13, 6129 (2022)
*This work was carried out under the auspices of the U.S. Department of Energy, Office of Science, Basic Energy Sciences, Materials Sciences and Engineering Division.
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Presenters
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Philip A Murgatroyd
- Los Alamos National Laboratory (LANL)