Spin-dependent seebeck effect and pure spin current in ferromagnetic fluorinated boron nitride nanotubes

Abstract

Based on the density functional theory combined with non-equilibrium Green's function formalism, we investigate the electronic structure and spin caloritronic transport properties of ferromagnetic fluorinated boron nitride nanotubes (F-BNNTs). The results show that these systems exhibit robust half-metallic feature and obvious spin-dependent Seebeck effect . Especially, pure spin current without charge current can be realized by tuning the temperature and temperature difference or by tuning the chirality of F-BNNT. The underlying mechanism is analyzed by the Fermi-Dirac distribution function, spin-resolved transmission spectra, band structures and current spectra. These results demonstrate that the ferromagnetic F-BNNTs hold great potential for spin caloritronics and ultra-low-energy-consumption nanoelectronic devices. • Electronic structure and spin caloritronic transport properties of F-BNNTs are investigated. • F-BNNTs exhibit robust half-metallic feature and obvious Spin-dependent Seebeck effect. • Pure spin current is realized by tuning the temperature and temperature difference. • Pure spin current is realized by tuning the chirality of F-BNNT.