Room-temperature spin-orbit magnetic fields in slightly misoriented (110) InGaAs/InAlAs multiple quantum wells

Koichi Nakanishi, Ayuki Arikawa, Yasuhito Saito, Daisuke Iizasa, Satoshi Iba, Yuzo Ohno, Nobuhide Yokota, Makoto Kohda, Yoshihiro Ishitani, Ken Morita

Research output: Contribution to journalArticlepeer-review

Abstract

Spin-orbit (SO) magnetic fields caused by the Dresselhaus SO interaction in slightly misoriented (110) InGaAs/InAlAs quantum wells (QWs) are investigated using the time-resolved and spatially resolved optical Kerr rotation technique. The Dresselhaus SO magnetic field is directed along the in-plane in the (001) QWs and along the out-of-plane in the (110) QWs. On the contrary, in QWs grown on a slightly misoriented (110) substrate, the out-of-plane and in-plane components of the Dresselhaus SO magnetic field coexist. In this study, the strong out-of-plane and the in-plane SO magnetic fields peculiar to the misoriented (110) InGaAs QWs are revealed at room temperature by analyzing spatially resolved diffusion-driven spin precession dynamics with a diagonally applied external magnetic field. Based on the scan position dependence of the spin precession frequency induced by the SO magnetic field, the simultaneous observations of the out-of-plane and the in-plane SO magnetic fields are achieved and Dresselhaus SO parameter is extracted to be 1.9×10−12 eV m. This value accounts for the scan position dependencies with various magnetic fields and reveals the reliability of the extracted SO parameter.

Original languageEnglish
Article number032405
JournalApplied Physics Letters
Volume119
Issue number3
DOIs
Publication statusPublished - 2021 Jul 19

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

Fingerprint

Dive into the research topics of 'Room-temperature spin-orbit magnetic fields in slightly misoriented (110) InGaAs/InAlAs multiple quantum wells'. Together they form a unique fingerprint.

Cite this