Fingerprints of the Local Moment Formation and its Kondo Screening in the Generalized Susceptibilities of Many-Electron Problems

被引：33
作者：
Chalupa, P. [1 ]
Schaefer, T. [2 ,3 ]
Reitner, M. [1 ]
Springer, D. [1 ,4 ]
Andergassen, S. [5 ,6 ]
Toschi, A. [1 ]
机构：
[1] TU Wien, Inst Solid State Phys, A-1040 Vienna, Austria
[2] Coll France, 11 Pl Marcelin Berthelot, F-75005 Paris, France
[3] Ecole Polytech, Inst Polytech Paris, CNRS, CPHT, Route Saclay, F-91128 Palaiseau, France
[4] IARAI, Inst Adv Res Artificial Intelligence, A-1030 Vienna, Austria
[5] Univ Tubingen, Inst Theoret Phys, Morgenstelle 14, D-72076 Tubingen, Germany
[6] Univ Tubingen, Ctr Quantum Sci, Morgenstelle 14, D-72076 Tubingen, Germany
来源：
PHYSICAL REVIEW LETTERS | 2021年 / 126卷 / 05期
基金：
欧洲研究理事会; 奥地利科学基金会;
关键词：
RENORMALIZATION-GROUP APPROACH; ENTROPY PRINCIPLE; SUPERFLUID SYSTEMS; ANDERSON MODEL;
D O I：
10.1103/PhysRevLett.126.056403
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
We identify the precise hallmarks of the local magnetic moment formation and its Kondo screening in the frequency structure of the generalized charge susceptibility. The sharpness of our identification even pinpoints an alternative criterion to determine the Kondo temperature of strongly correlated systems on the two-particle level, which only requires calculations at the lowest Matsubara frequency. We showcase its strength by applying it to the single impurity and the periodic Anderson model as well as to the Hubbard model. Our results represent a significant progress for the general understanding of quantum field theory at the two-particle level and allow for tracing the limits of the physics captured by perturbative approaches for correlated systems.
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页数：9
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