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Updated: Jan 8, 2026
Probe Type II Band Alignment in One-Dimensional Van Der Waals Heterostructures Using First-Principles Calculations
Published on: October 12, 2019
High-order harmonic generation in type-II Weyl semimetal TaIrTe4
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In condensed matter physics, the study of topological materials has recently extended to the topological chirality of Weyl nodes in type-II Weyl semimetals such as TaIrTe4. High-order harmonic generation under strong-field excitation serves as an all-optical probe of their unique electronic topology. Here, we report the high-order harmonic generation in TaIrTe4, which exhibits a strong handedness-dependent asymmetry in the ellipticity dependence of harmonic yield, as well as the continuously tunable polarization states of harmonics driven by an elliptically polarized laser. By analyzing the underlying mechanisms, we identify the imprint of the distinct properties of TaIrTe4 within the harmonic emissions, including the broken inversion symmetry, the tilted chiral Weyl cone and Berry curvature. Our results establish the potential possibility of high-order harmonic generation as a sensitive probe for complex topological properties in quantum materials under strong-field conditions.
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