Symmetric Anderson impurity model: magnetic susceptibility, specific heat and Wilson ratio

0498406 - FZÚ 2019 RIV NL eng J - Journal Article
Zalom, Peter - Pokorný, Vladislav - Janiš, Václav
Symmetric Anderson impurity model: magnetic susceptibility, specific heat and Wilson ratio.
Physica B-Condensed Matter. Roč. 536, May (2018), s. 704-707. ISSN 0921-4526. E-ISSN 1873-2135
R&D Projects: GA ČR GA15-14259S
Institutional support: RVO:68378271
Keywords : kondo effect * thermodynamic perturbation theory * two-particle renormalization * quantum criticality * impurity
OECD category: Condensed matter physics (including formerly solid state physics, supercond.)
Impact factor: 1.874, year: 2018

We extend the spin-polarized effective-interaction approximation of the parquet renormalization scheme from Refs. [1,2] applied on the symmetric Anderson model by adding the low-temperature asymptotics of the total energy and the specific heat. We calculate numerically the Wilson ratio and determine analytically its asymptotic value in the strong-coupling limit. We demonstrate in this way that the exponentially small Kondo scale from the strong-coupling regime emerges in qualitatively the same way in the spectral function, magnetic susceptibility and the specific heat.
Permanent Link: http://hdl.handle.net/11104/0290778