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Related Experiment Video

Updated: May 15, 2025

Visualizing Uniaxial-strain Manipulation of Antiferromagnetic Domains in Fe1+YTe Using a Spin-polarized Scanning Tunneling Microscope

Visualizing Uniaxial-strain Manipulation of Antiferromagnetic Domains in Fe1+YTe Using a Spin-polarized Scanning Tunneling Microscope

Published on: March 24, 2019

Ferrovalley Physics in Stacked Bilayer Altermagnetic Systems.

Yun-Qin Li^1,2, Yu-Ke Zhang¹, Xin-Le Lu¹

¹Key Laboratory of Polar Materials and Devices (MOE), School of Physics and Electronic Science and Shanghai Center of Brain-inspired Intelligent Materials and Devices, East China Normal University, Shanghai 200241, China.

|April 7, 2025

Summary

Interlayer sliding in altermagnets can induce and control large valley polarization. This discovery opens new avenues for spintronics and valleytronics by correlating spin, valley, layer, and optical properties.

Keywords:

Altermagnetism Ferrovalley Interlayer Sliding Optical Selection Rule Spintronics

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Last Updated: May 15, 2025

Visualizing Uniaxial-strain Manipulation of Antiferromagnetic Domains in Fe1+YTe Using a Spin-polarized Scanning Tunneling Microscope

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Published on: October 5, 2013

Area of Science:

Condensed Matter Physics
Materials Science

Background:

Altermagnets are an emerging magnetic phase with compensated magnetic order and nonrelativistic spin-splitting.
Strain engineering is known to induce valley polarization in altermagnets, but controllable switching remains a challenge.

Purpose of the Study:

To propose and investigate interlayer sliding as a method for inducing and manipulating valley polarization in altermagnets.
To explore the potential of Fe2MX4 (M = Mo, W; X = S, Se, Te) for ferrovalley states.

Main Methods:

Tight-binding model calculations.
First-principles calculations.

Main Results:

Interlayer sliding successfully induces and effectively manipulates large valley polarization in altermagnets.
Sliding-induced ferrovalley states exhibit unique properties like spin-orbit coupling-independent linear optical dichroism and anomalous valley Hall effect.
Demonstrated potential in the Fe2MX4 family.

Conclusions:

Interlayer sliding offers a viable route for controllable valley polarization in altermagnets.
The findings highlight a correlation between spin, valley, layer, and optical degrees of freedom.
Altermagnets show promise for applications in spintronics, valleytronics, and their hybrid fields.