Hubbard model

Kondo effect

Operating system

Identification (biology)

Physics

Statistical physics

Tracing

Electron

Strongly correlated material

Moment (physics)

Charge (physics)

Anderson impurity model

Condensed matter physics

Theoretical physics

Computer science

Superconductivity

Magnetic moment

Botany

Quantum mechanics

Kondo insulator

Quantum

Biology

Physical Review Letters

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 in correlated regimes.

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