Chiral materials,similarly to human hands,have distinguishable right-handed and left-handed enantiomers which may behave differently in response to external stimuli.Here,we use for the first time an approach based on ...Chiral materials,similarly to human hands,have distinguishable right-handed and left-handed enantiomers which may behave differently in response to external stimuli.Here,we use for the first time an approach based on the density functional theory(DFT)+PAOFLOW calculations to quantitatively estimate the so-called collinear Rashba–Edelstein effect(REE)that generates spin accumulation parallel to charge current and can manifest as chirality-dependent charge-to-spin conversion in chiral crystals.Importantly,we reveal that the spin accumulation induced in the bulk by an electric current is intrinsically protected by the quasi-persistent spin helix arising from the crystal symmetries present in chiral systems with the Weyl spin–orbit coupling.In contrast to conventional REE,spin transport can be preserved over large distances,in agreement with the recent observations for some chiral materials.This allows,for example,the generation of spin currents from spin accumulation,opening novel routes for the design of solid-state spintronics devices.展开更多
基金The calculations were carried out on the Dutch national e-infrastructure with the support of SURF Cooperative(EINF-2070),on the Peregrine high-performance computing cluster of the University of Groningen and in the Texas Advanced Computing Center at the University of Texas,Austin.
文摘Chiral materials,similarly to human hands,have distinguishable right-handed and left-handed enantiomers which may behave differently in response to external stimuli.Here,we use for the first time an approach based on the density functional theory(DFT)+PAOFLOW calculations to quantitatively estimate the so-called collinear Rashba–Edelstein effect(REE)that generates spin accumulation parallel to charge current and can manifest as chirality-dependent charge-to-spin conversion in chiral crystals.Importantly,we reveal that the spin accumulation induced in the bulk by an electric current is intrinsically protected by the quasi-persistent spin helix arising from the crystal symmetries present in chiral systems with the Weyl spin–orbit coupling.In contrast to conventional REE,spin transport can be preserved over large distances,in agreement with the recent observations for some chiral materials.This allows,for example,the generation of spin currents from spin accumulation,opening novel routes for the design of solid-state spintronics devices.
