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arXiv · 1904.12779

Energy Scales of the Doped Anderson Lattice Model

Hanhim Kang·Kristjan Haule·Gabriel Kotliar·Piers Coleman·Ji Hoon Shim
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Abstract

This paper explores the energy scales of the doped Anderson lattice model using dynamical mean-field theory (DMFT), using a continuous-time Quantum Monte Carlo (CTQMC) impurity solver. We show that the low temperature properties of the lattice can not be scaled using the single ion local Kondo temperature $T_K$ but instead are governed by a doping-dependent coherence temperature $T*$ which can be used to scale the temperature dependence of the spectral function, transport properties, and entropy. At half filling $T*$ closely approximates the single ion $T_K$, but as the filling $n_c$ is reduced to zero, $T*$ also vanishes. The coherence temperature $T*$ is shown to play a role of effective impurity Kondo temperature in the lattice model, and physical observables show significant evolution at $T*$. In the DMFT framework, we showed that the hybridization strength of the effective impurity model is qualitatively affected by the doping level, and determines $T*$ in the lattice model.

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Hanhim Kang, Kristjan Haule, Gabriel Kotliar, Piers Coleman, Ji Hoon Shim. 2019-04-30. Energy Scales of the Doped Anderson Lattice Model. https://doi.org/10.1103/physrevb.99.165115

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