Drift spin dynamics in two-dimensional electron gas (Conference Presentation)

Yoji Kunihashi; Yusuke Tanaka; Haruki Sanada; Koji Onomitsu; Hideki Gotoh; Makoto Kohda; Junsaku Nitta; Tetsuomi Sogawa

doi:10.1117/12.2526911

10 September 2019 Drift spin dynamics in two-dimensional electron gas (Conference Presentation)

Yoji Kunihashi, Yusuke Tanaka, Haruki Sanada, Koji Onomitsu, Hideki Gotoh, Makoto Kohda, Junsaku Nitta, Tetsuomi Sogawa

Proceedings Volume 11090, Spintronics XII; 110900H (2019) https://doi.org/10.1117/12.2526911
Event: SPIE Nanoscience + Engineering, 2019, San Diego, California, United States

Abstract

Several types of spin-based logic devices have been proposed in recent years. Almost all of them are operated by employing the drift transport of electron spins under in-plane electric fields. However, it is still unclear how an in-plane electric field influences the spin dynamics of drifting electrons. Here, we demonstrated long-distance spin transport in a GaAs quantum well, where the spin-orbit interactions (SOI) were set at exactly the SU(2) symmetry generating a persistent spin helix (PSH) state. The spatial distribution and temporal development of optically-injected electron spins in a modulation-doped GaAs single quantum well were detected with Kerr rotation microscopy based on the pump-probe technique at T = 8 K. We found that the transport length of drifting spins in a PSH condition exceeds 100 micrometers due to the suppression of D’yakonov-Perel spin relaxations [1]. The spin precession period, spin decay length and transport path of drifting spins can be controlled by electrical means in a single device. We also observed a drift-induced change in the spin precession period for drifting electron spins by visualizing the spatial distribution of electron spins. This phenomenon results from the cubic term of the Dresselhaus SOI enhanced by the application of in-plane electric fields [2]. Our finding will be of great importance for a deeper understanding of spin transport dynamics as well as for relevant spintronics applications using an in-plane electric field. [1] Y. Kunihashi et al., Nat. Commun. 7, 10722 (2016). [2] Y. Kunihashi et al., Phys. Rev. Lett. 119, 187703 (2017).

Conference Presentation

Citation Download Citation

Yoji Kunihashi, Yusuke Tanaka, Haruki Sanada, Koji Onomitsu, Hideki Gotoh, Makoto Kohda, Junsaku Nitta, and Tetsuomi Sogawa "Drift spin dynamics in two-dimensional electron gas (Conference Presentation)", Proc. SPIE 11090, Spintronics XII, 110900H (10 September 2019); https://doi.org/10.1117/12.2526911

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available

Members: $17.00

Non-members: $21.00 ADD TO CART

PROCEEDINGS
PRESENTATION

WATCH
PRESENTATION SAVE TO MY LIBRARY

GET CITATION

KEYWORDS

Spin dynamics

Electron transport

Gallium arsenide

Quantum wells

Logic devices

Microscopy

Modulation

Show All Keywords

Keywords/Phrases

Search In:

Publication Years