Spin-valley thermoelectric characteristics of ferromagnetic silicene superlattice

Based on the transfer matrix method valley-spin caloritronic transport properties of ferromagnetic silicene superlattice are investigated theoretically under ac-field effect of various frequencies. The purpose of this work is to describe resolved thermoelectric parameters such as (charge, spin and valley) Seebeck and Peltier coefficients and electronic thermal conductance, by photon-assisted tunneling probability bases. An oscillatory behavior is resulted for all investigated thermoelectric parameters in this investigation. These oscillations might be due to photon assisted tunneling. The improved values of charge, spin, valley power factors might be due to quantum confinement effect, which leads to enhancements of charge, spin, valley figure of merits as indicated from the obtained results. Also, results show that ferromagnetic silicene superlattice is good to use as energy harvesting thermoelectric nanodevice (Seebeck coefficient), and may be used as nanoelectronic devices cooler (Peltier coefficient). So, this present research shows that ferromagnetic silicene superlattice is good promising for flexible thermoelectric power generation. (C) 2020 The Authors. Published by Elsevier B.V. on behalf of Faculty of Engineering, Ain Shams University.

Automated summary

Theoretical investigations of valley-spin caloritronic transport properties of ferromagnetic silicene superlattice under ac-field effect are conducted using the transfer matrix method at various frequencies. The study focuses on describing resolved thermoelectric parameters and reveals an oscillatory behavior in all investigated thermoelectric parameters, which may be due to photon-assisted tunneling. Improved power factors are observed and attributed to the quantum confinement effect. The findings suggest that ferromagnetic silicene superlattice shows promise for energy harvesting and cooling applications in nanodevices.