Single-impurity Anderson model out of equilibrium: A two-particle semianalytic approach

0555528 - FZÚ 2023 RIV US eng J - Journal Article
Yan, Jiawei - Janiš, Václav
Single-impurity Anderson model out of equilibrium: A two-particle semianalytic approach.
Physical Review B. Roč. 105, č. 8 (2022), č. článku 085122. ISSN 2469-9950. E-ISSN 2469-9969
R&D Projects: GA ČR GA19-13525S
Institutional support: RVO:68378271
Keywords : single-impurity Anderson model * non-equilibrium * two-particle vertex * reduced parquet equations * steady state * Coulomb blockade * tunneling
OECD category: Condensed matter physics (including formerly solid state physics, supercond.)
Impact factor: 3.7, year: 2022
Method of publishing: Limited access
https://doi.org/10.1103/PhysRevB.105.085122

We apply a two-particle semianalytic approach to a single Anderson impurity attached to two biased metallic leads. The theory is based on reduced parquet equations justified in critical regions of singularities in the Bethe-Salpeter equations. It offers a way to treat one-particle and two-particle thermodynamic and spectral quantities on the same footing. The two-particle vertices are appropriately renormalized so that spurious transitions into the magnetic state of the weak-coupling approximations are suppressed. We qualitatively reproduce the three transport regimes with the increasing temperature: from the Kondo resonant tunneling through the Coulomb-blockade regime up to a sequential tunneling regime. Far from equilibrium, we find that the bias plays a similar role as the temperature in destroying the Kondo resonant peak when the corresponding energy scale is comparable with the Kondo temperature.

Permanent Link: https://hdl.handle.net/11104/0333618