title: Generation of Rashba spin-orbit coupling in CdSe nanowire by ionic liquid gate.
abstract: Spintronic devices rely on the spin degree of freedom (DOF), and spin orbit coupling (SOC) is the key to manipulate spin DOF. Quasi-one-dimensional structures, possessing marked anisotropy gives more choice for the manipulation of the spin DOF since the concrete SOC form varies along with crystallographic directions. The anisotropy of the Dresselhaus SOC in cadmium selenide (CdSe) nanobelt and nanowire was studied by circular photogalvanic effect. It was demonstrated that the Dresselhaus SOC parameter is zero along the [0001] crystallographic direction, which suppresses the spin relaxation and increases the spin diffusion length, and thus is beneficial to the spin manipulation. To achieve a device structure with Rashba SOC presence and Dresselhaus SOC absence for manipulating the spin DOF, an ionic liquid gate was produced on a nanowire grown along the [0001] crystallographic direction, and the Rashba SOC was induced by gating, as expected.
authors.affiliation: State Key Laboratory of Artificial Microstructure and Mesoscopic Physics, School of Physics, Peking University , Beijing 100871, People's Republic of China.
authors.forename: Shan
authors.initials: S
authors.lastname: Zhang
authors.forename: Ning
authors.initials: N
authors.lastname: Tang
authors.forename: Weifeng
authors.initials: W
authors.lastname: Jin
authors.forename: Junxi
authors.initials: J
authors.lastname: Duan
authors.forename: Xin
authors.initials: X
authors.lastname: He
authors.forename: Xin
authors.initials: X
authors.lastname: Rong
authors.forename: Chenguang
authors.initials: C
authors.lastname: He
authors.forename: Lisheng
authors.initials: L
authors.lastname: Zhang
authors.forename: Xudong
authors.initials: X
authors.lastname: Qin
authors.forename: Lun
authors.initials: L
authors.lastname: Dai
authors.forename: Yonghai
authors.initials: Y
authors.lastname: Chen
authors.forename: Weikun
authors.initials: W
authors.lastname: Ge
authors.forename: Bo
authors.initials: B
authors.lastname: Shen
mesh_terms: D019187:Cadmium Compounds / Q000737:chemistry*; D003461:Crystallography; D052578:Ionic Liquids / Q000737:chemistry*; D046529:Microscopy, Electron, Transmission; D053770:Nanowires; D018036:Selenium Compounds / Q000737:chemistry*
chemical_list: D019187:Cadmium Compounds; D052578:Ionic Liquids; D018036:Selenium Compounds; C058667:cadmium selenide
keywords: CdSe nanobelt/nanowire; Dresselhaus SOC; Rashba spin orbit coupling (SOC); circular photogalvanic effect; ionic liquid