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Related Experiment Video

Updated: Jan 8, 2026

Probe Type II Band Alignment in One-Dimensional Van Der Waals Heterostructures Using First-Principles Calculations

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High-order harmonic generation in type-II Weyl semimetal TaIrTe₄.

Siyuan Yao, Peng Yu, Zhiyuan Lou

|December 19, 2025

Summary

High-order harmonic generation in TaIrTe₄ reveals its topological chirality. This all-optical method shows handedness-dependent asymmetry and tunable polarization, probing quantum material properties.

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Last Updated: Jan 8, 2026

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Area of Science:

Condensed matter physics
Quantum materials science
Strong-field physics

Background:

Topological materials with Weyl nodes are key in condensed matter physics.
Type-II Weyl semimetals like TaIrTe₄ exhibit topological chirality.
High-order harmonic generation (HHG) is an all-optical probe for electronic topology.

Purpose of the Study:

To investigate high-order harmonic generation in the type-II Weyl semimetal TaIrTe₄.
To explore the potential of HHG as a probe for complex topological properties.

Main Methods:

Utilized strong-field excitation with lasers.
Analyzed high-order harmonic generation in TaIrTe₄.
Investigated the ellipticity dependence and polarization states of harmonic emissions.

Main Results:

Observed strong handedness-dependent asymmetry in HHG yield.
Demonstrated continuously tunable polarization states of harmonics.
Identified imprints of broken inversion symmetry, chiral Weyl cones, and Berry curvature in harmonic emissions.

Conclusions:

HHG in TaIrTe₄ is sensitive to its unique topological properties.
The study establishes HHG as a promising tool for probing quantum materials under strong fields.