Exploration of Spin-Dependent Thermoelectricity in the Chiral Double-Stranded DNA Molecule Coupled to Ferromagnetic Leads

Abstract

Spin selectivity in double-stranded DNA (dsDNA) molecules is unambiguously linked to their intrinsic chirality. Nevertheless, how the chiral-induced spin selectivity (CISS) effect in dsDNA influences spin-dependent thermoelectricity needs to be understood well, to comprehend the relationship between spin and heat transport. To this end, the authors explore the spin Seebeck effect of a chiral dsDNA-based magnetic junction, and elucidate the underlying physics relevant to the CISS effect by means of linear-response theory and nonequilibrium Green's functions. Their results provide valuable guidelines for engineering innovative spin-caloritronic devices based on chiral organic molecules.