Observation of High Spin-to-Charge Conversion by Sputtered Bismuth Selenide Thin Films at Room Temperature

• DOI: 10.1021/acs.nanolett.8b05011
• Publication Date: 2019-07-08T20:32:17Z
• Authors: Mahendra DC; Jun-Yang Chen; Thomas Peterson; Protuysh Sahu; Bin Ma; Naser Mousavi; Ramesh Harjani; Jian-Ping Wang
• Keywords: Cadmium selenide; Selenide; Bismuth

We investigated spin-to-charge conversion in sputtered Bi43Se57/Co20Fe60B20 heterostructures with in-plane magnetization at room temperature. High voltage signals have been observed The transmission electron microscope images show that the bismuth selenide thin films are nanogranular structure. spin-pumping decreases an increase size of grains. inverse Edelstein effect length (λIEE) is estimated to be as large 0.32 nm. λIEE due spin-momentum locking and further enhanced by quantum confinement nanosized grains films. also on insertion layers MgO Ag. layer has almost completely suppressed voltage, whereas Ag 43%.