Gate-tunable large magnetoresistance in an all-semiconductor spin valve device.

ABSTRACT: A large spin-dependent and electric field-tunable magnetoresistance of a two-dimensional electron system is a key ingredient for the realization of many novel concepts for spin-based electronic devices. The low magnetoresistance observed during the last few decades in devices with lateral semiconducting transport channels between ferromagnetic source and drain contacts has been the main obstacle for realizing spin field effect transistor proposals. Here, we show both a large two-terminal magnetoresistance in a lateral spin valve device with a two-dimensional channel, with up to 80% resistance change, and tunability of the magnetoresistance by an electric gate. The enhanced magnetoresistance is due to finite electric field effects at the contact interface, which boost spin-to-charge convers

SUBMITTER: Oltscher M 

PROVIDER: S-EPMC5702618 | biostudies-literature | 2017 Nov

REPOSITORIES: biostudies-literature