Abstract
Efficient generation of spin polarization is very important for spintronics and quantum computation.In chiral materials without magnetic order nor spin-orbit coupling,we find a new spin selectivity effect-chiral phonon activated spin Seebeck(CPASS)effect.Starting with the nonequilibrium distribution of chiral phonons under a temperature gradient,the CPASS coefficients are computed based on the Boltzmann transport theory.With both the phonon-drag and band transport contributions,the spin accumulations generated by the CPASS effect exhibit quadratic dependence on the temperature gradient.The strength of the CPASS effect and the relative magnitude of both contributions are tunable by the chemical potential modulation.The CPASS effect,which gives a promising explanation on the traditional chiral-induced spin selectivity effect,provides opportunities for the exploration of advanced spintronic devices based on chiral materials even in the absence of any magnetic order and spin-orbit coupling.
基金项目
国家自然科学基金(12374044)
国家自然科学基金(11904173)
国家自然科学基金(11890703)
国家自然科学基金(12275133)
Jiangsu Specially-Appointed Professor Program()
National Key Research and Development Project from Ministry of Science and Technology of China(2022YFA1203100)
the"Shuangchuang"Doctor Program of Jiangsu Province(JSS-CBS20210341)
维普
万方数据