Effects of Correlated Hopping on Thermoelectric Response of a Quantum dot Strongly Coupled to Ferromagnetic Leads

Abstract

The impact of correlated hopping on thermoelectric transport is theoretically investigated through a quantum dot coupled to ferromagnetic leads. Using the accurate numerical renormalization group method, the transport characteristics are analyzed, focusing on the interplay between electronic correlations, spin-dependent transport processes, and thermoelectric response. The electrical conductance and thermopower are calculated as functions of the dot energy level, lead polarization, and the amplitude of correlated hopping. Moreover, the effect of competing correlations is analyzed on the Kondo resonance and discuss the asymmetry of conductance peaks under the influence of the exchange field. It is demonstrated that the presence of correlated hopping is responsible for asymmetric spin-dependent transport characteristics. These results provide valuable insight into how correlated hopping affects spin-dependent transport and thermoelectric efficiency in quantum dot systems with ferromagnetic contacts.