Real-space dynamical mean-field theory of Friedel oscillations in strongly correlated electron systems

0521047 - FZÚ 2020 RIV US eng J - Journal Article
Chatterjee, Banhi - Skolimowski, J. - Makuch, K. - Byczuk, K.
Real-space dynamical mean-field theory of Friedel oscillations in strongly correlated electron systems.
Physical Review B. Roč. 100, č. 11 (2019), s. 1-15, č. článku 115118. ISSN 2469-9950. E-ISSN 2469-9969
Institutional support: RVO:68378271
Keywords : sum-rule * transition * impurities * scattering * fermions * density * metals
OECD category: Atomic, molecular and chemical physics (physics of atoms and molecules including collision, interaction with radiation, magnetic resonances, Mössbauer effect)
Impact factor: 3.575, year: 2019
Method of publishing: Limited access
https://doi.org/10.1103/physrevb.100.115118

We study Friedel oscillations and screening effects of the impurity potential in the Hubbard model. Electronic correlations are accounted for by solving the real-space dynamical mean-field theory equations using the continuous time quantum Monte-Carlo simulations at finite temperatures and using a homogeneous self-energy approximation with the numerical renormalization group at zero temperature. We find that in the Fermi liquid phase both the amplitudes of Friedel oscillations and the screening charge decrease with increasing the interaction and follow the behavior of the Fermi liquid renormalization factor. Inside the Mott insulator regime the Friedel oscillations are absent but the residual screening charge remains finite.
Permanent Link: http://hdl.handle.net/11104/0305703