2014/03/31 by A. C. Seridonio, Ezequiel Costa Siqueira, E. C. Siqueira +6 · 6 citations
Physics and Astronomy · #Anderson impurity model #Charge (physics) #Condensed matter physics #Electrical resistivity and conductivity #Electron #Kondo effect #Materials science #Physics #Physics of Superconductivity and Magnetism #Quantum and electron transport phenomena #Quantum mechanics #Seebeck coefficient #Spin (aerodynamics) #Surface and Thin Film Phenomena #Thermoelectric effect #cond-mat.mes-hall #cond-mat.str-el
paper · pdf · doi:10.1103/physrevb.90.174305
published in Physical Review B 90(17) (American Physical Society)
openalex publication_date 2014/11/20 · arxiv created 2014/11/24 · arxiv updated 2014/11/25 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
We theoretically investigate the thermoelectric properties of a spin-polarized two-dimensional electron gas hosting a Kondo adatom hybridized with a STM tip. Such a setup is treated within the single-impurity Anderson model in combination with the atomic approach for the Green's functions. Due to the spin dependence of the Fermi wave numbers, the electrical and thermal conductances together with thermopower and Lorenz number reveal beating patterns as a function of the STM tip position in the Kondo regime. In particular, by tuning the lateral displacement of the tip with respect to the adatom vicinity, the temperature, and the position of the adatom level, one can change the sign of the Seebeck coefficient through charge and spin. This opens a possibility of the microscopic control of the heat flux analogously to that established for the electrical current.