Spin-valley thermoelectric characteristics of ferromagnetic silicene superlattice

Abstract

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.

Keywords

• Valley-spin caloritronics
• Seebeck coefficient
• Peltier coefficient
• Power factor
• Figure of merit
• Photon assisted quantum transport