华东师范大学学报（自然科学版）Issue(2)：101-108,8.DOI:10.3969/j.issn.1000-5641.2018.02.010
二维过渡金属硫化物中Rashba自旋轨道耦合效应的电场调控研究
Electrical manipulation of Rashba spin-orbit coupling in the two-dimensional transition metal dichalcogenide
摘要
Abstract
Using the first-principles density functional theory calculations,we investigate the Rashba spin-orbit coupling of the transition metal dichalcogenide (TMD) monolayers MX2(M=Mo,W;X =S,Se,Te) induced by the external electric field.It is found that the anions X play an important role on the Rashba spin-orbit coupling effect.With the increase of the atomic number of X,Rashba spin-orbit splitting around the Γ point increases more distinctively,and the external electric field can hardly influence the cations because of the coverage by the anions.Thus the strength of the Rashba spin-orbit coupling follows the sequence:WTe2 ＞MoTe2 ＞WSe2 ＞MoSe2 ＞WS2 ＞MoS2.Furthermore,the distribution of the spin polarization along the high symmetry line Γ-K/K＇ turns from the vertical direction to the two-dimensional plane under the external electric fields,and the in-plane spin polarization distribution rises with the increase of the external electric field.关键词
二维过渡金属硫化物/Rashba自旋轨道耦合/第一性原理计算Key words
two-dimentional transition metal dichalcogenide/Rashba spin-orbit coupling/first-principles calculation分类
数理科学引用本文复制引用
姚群芳,蔡佳,龚士静..二维过渡金属硫化物中Rashba自旋轨道耦合效应的电场调控研究[J].华东师范大学学报（自然科学版）,2018,(2):101-108,8.基金项目
上海市自然科学基金(14ZR1412700) （14ZR1412700）
国家自然科学基金(61774059) （61774059）
