2014/02/28 by Christoph B. M. Hörig, Christophe Mora, Dirk Schuricht
Physics and Astronomy · #Anderson impurity model #Ansatz #Bethe ansatz #Condensed matter physics #Conductance #Coupling (piping) #Electrical resistivity and conductivity #Electron #Fermi liquid theory #Kondo effect #Kondo model #Materials science #Physics #Physics of Superconductivity and Magnetism #Quantum #Quantum and electron transport phenomena #Quantum mechanics #Spin (aerodynamics) #Statistical physics #Superconductivity #Thermodynamics #Topological Materials and Phenomena #cond-mat.mes-hall #cond-mat.str-el
paper · pdf · doi:10.1103/physrevb.89.165411
published as Phys. Rev. B 89, 165411 (2014) · 23 pages
arxiv created 2014/03/19 · openalex publication_date 2014/04/11 · arxiv updated 2014/04/14 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/06
We study the nonequilibrium transport properties of fully (exactly) screened Kondo quantum dots subject to a finite bias voltage or a finite temperature. First, we calculate the Fermi-liquid coefficients of the conductance for models with arbitrary spin, i.e., its leading behavior for small bias voltages or temperatures. Second, we determine the low-temperature behavior of the static susceptibility from the exactly known Bethe ansatz results for the magnetization. Third, we study the crossover from strong to weak coupling in the spin-1/2 and the spin-1 models coupled to one or two screening channels, respectively. Using a real-time renormalization group method we calculate the static and dynamical spin-spin correlation functions for the spin-1/2 model as well as the linear and differential conductance and the static susceptibility for the spin-1 model. We define various Kondo scales and discuss their relations. We assess the validity of the renormalization-group treatment by comparing with known results for the temperature dependence of the linear conductance and static susceptibility as well as the Fermi-liquid behavior at low energies.