Scaling of the Anderson Lattice Model Studied by DMFT with CTQMC Impurity Solver
- Title
- Scaling of the Anderson Lattice Model Studied by DMFT with CTQMC Impurity Solver
- Authors
- SHIM, JI HOON; KANG, HANHIM; Jae-Nyeong KIM; Hong-Chul CHOI
- Date Issued
- 2017-07-17
- Publisher
- SCES
- Abstract
- The Kondo lattice model is known to be the minimal model for the heavy fermi liquid state of the heavy fermion
systems. In spite of its fermi-liquid-like behaviour - T2 resistivity, T-linear specific heat, and T-independent spin
susceptibility - its nature including the scaling relation of various physical quantities has not fully unveiled yet [1].
It is due to the fact that an analytic methodology based on the mean-field theory is limited to describe finitetemperature
properties such as very incoherent spectrum near the Fermi level, and there is no concrete
methodology for describing the strong coupling nature of the heavy fermion systems. On the other hand, DMFT is
one of the most promising candidate for describing the strongly correlated system in a non-perturbative manner [2].
Using DMFT with numerically exact CTQMC impurity solver, we may perform a very well-controlled experiment
on ideal model systems. In this work, we studied the Kondo lattice model by the dynamical mean-field theory
(DMFT) with continuous time quantum Monte-Carlo (CTQMC) impurity solver [3].
As a result, we observed the scaling of various physical quantities such as the local spin susceptibility and
scattering rate of the Kondo lattice model with different hybridisation strength and temperature. Compared with the
Kondo impurity model, Kondo lattice shows different scaling energy scale due to the feedback effect of the DMFT.
Additionally, temperature evolutions of the spectral properties such as the Fermi surface and band structure at the
characteristic energy scale will be given. Discussion on how the feedback effect may change the RG beta function
will be also given.
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/41494
- Article Type
- Conference
- Citation
- International Conference on Strongly Correlated Electron Systems-Sces2017, page. 19 - 19, 2017-07-17
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