open access

https://hdl.handle.net/2115/93068

Antiparallel Spin Polarization Induced by Current in a Bilayer

英語

Rashba effective magnetic field

2023-12

Wiley-Blackwell

Physica status solidi B-basic solid state physics

260(12)

2300237

The antiparallel current-induced spin polarization (CISP) in an inversion-symmetric double-quantum-well structure with the antiparallel Rashba effective magnetic field is calculated by solving the Boltzmann equation which is derived for the distribution operator in layer-pseudospin space in the relaxation-time approximation. The antiparallel CISP in an analytical form, obtained for constant momentum relaxation time in the limit of large Fermi energy, exhibits factor-two increase with increasing the interlayer-tunneling strength. This increase originates from the correction (to the semiclassical CISP) created by the subband mixing due to the momentum dependence of the Rashba effective magnetic field. The present interlayer-coupling dependence of the antiparallel CISP is successfully explained as the layer-pseudospin Hanle effect in which the spin in the original Hanle effect is replaced by the layer pseudospin. The present finding suggests that the correction by band mixing can be significant in the transport properties of various systems with the momentum-dependent effective magnetic field.

学術雑誌論文

Accepted Manuscript

This is the peer reviewed version of the following article: Kato, T. and Akera, H. (2023), Antiparallel Spin Polarization Induced by Current in a Bilayer. Phys. Status Solidi B, 260: 2300237, which has been published in final form at https://doi.org/10.1002/pssb.202300237. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Use of Self-Archived Versions. This article may not be enhanced, enriched or otherwise transformed into a derivative work, without express permission from Wiley or by statutory rights under applicable legislation. Copyright notices must not be removed, obscured or modified. The article must be linked to Wiley’s version of record on Wiley Online Library and any embedding, framing or otherwise making available the article or pages thereof by third parties from platforms, services and websites other than Wiley Online Library must be prohibited.

0370-1972