Strain modulation of photocurrent in Weyl semimetal TaIrTe4

We study the effect of the strain on the energy bands of TaIrTe4 sheet and the photocurrent in the Cu-TaIrTe4-Cu heterojunction by using the quantum transport simulations. It is found that the Weyl points can be completely broken with increasing of the strain along z dirction. One can obtain a large...

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Bibliographic Details
Published in:arXiv.org 2022-06
Main Authors: Ding, Ying, Wang, XinRu, Liao, LieHong, Chen, XinYu, Zhang, JiaYan, Wang, YueYue, Hao, Ying, Li, Yuan
Format: Article
Language:English
Subjects:
Banded structure
Energy bands
Heterojunctions
Photoelectric effect
Photoelectric emission
Quantum transport
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Summary:We study the effect of the strain on the energy bands of TaIrTe4 sheet and the photocurrent in the Cu-TaIrTe4-Cu heterojunction by using the quantum transport simulations. It is found that the Weyl points can be completely broken with increasing of the strain along z dirction. One can obtain a large photocurrent in the Cu-TaIrTe4-Cu heterojunction in the absence of the strain. While the photocurrent can be sharply enhanced by the strain and reach a large value. Accordingly, the maximum values of the photocurrent can be explained in terms of the transitions between peaks of density of states and band structures. The strain-induced energy bands and photocurrent exhibit anisotropic behaviors. Our results provide a novel route to effectively modulate the energy bands and the photocurrent by utilizing mechanical methods for TaIrTe4-based devices.
ISSN:2331-8422
DOI:10.48550/arxiv.2206.08281