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Updated: Jan 16, 2026

Fabricating van der Waals Heterostructures with Precise Rotational Alignment

Fabricating van der Waals Heterostructures with Precise Rotational Alignment

Published on: July 5, 2019

Crystallographic Engineering for Enhanced Orbital Torque.

Hiroki Hayashi^1,2, Jieyi Chen³, Daegeun Jo^4,5

¹Department of Applied Physics and Physico-Informatics, Keio University, Yokohama 223-8522, Japan.

|October 1, 2025

Summary

This summary is machine-generated.

Crystal orientation engineering enhances orbital torque efficiency in spintronic devices. Aligning crystal structures improves orbital current transport, advancing the field of orbitronics.

Keywords:

orbital Hall effect orbital torque orbitronics spintronics spin−orbit torque

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Last Updated: Jan 16, 2026

Fabricating van der Waals Heterostructures with Precise Rotational Alignment

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Published on: July 5, 2019

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Magnetic Tweezers for the Measurement of Twist and Torque

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Published on: May 19, 2014

Area of Science:

Physics
Materials Science
Condensed Matter Physics

Background:

Spin currents and spin torques are fundamental to spintronic devices.
Orbital currents and torques are emerging phenomena in orbitronics.
Controlling orbital currents and torques in solid-state devices is challenging.

Purpose of the Study:

To demonstrate crystal orientation engineering as a method to control orbitronic devices.
To investigate the effect of crystal orientation on orbital torque efficiency.
To understand the mechanisms behind enhanced orbital torque.

Main Methods:

Investigated orbital torque in ferromagnets with epitaxially grown orbital current sources.
Compared torque efficiency across distinct crystal orientations.
Analyzed the alignment between momentum-space hotspots of orbital Berry curvature and orbital transport.

Main Results:

Distinct crystal orientations between ferromagnets and orbital sources significantly enhance orbital torque efficiency.
Enhanced efficiency is attributed to improved alignment of momentum-space hotspots.
Demonstrated a counterintuitive result regarding crystal orientation's impact.

Conclusions:

Crystal orientation engineering is a key strategy for advancing orbitronic devices.
Achieving quantitative understanding of orbital transport and dynamics is facilitated by crystallographic control.
This work paves the way for more efficient orbitronic applications.