Strain modulation of photocurrent in Weyl semimetal TaIrTe4
Abstract
We study the effect of the strain on the energy bands of a 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 an increase of the strain along the z direction. 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, to the best of our knkowledge, route to effectively modulate the energy bands and the photocurrent by utilizing mechanical methods for TaIrTe4-based devices.
- Publication:
-
Optics Letters
- Pub Date:
- October 2022
- DOI:
- 10.1364/OL.466325
- arXiv:
- arXiv:2206.08281
- Bibcode:
- 2022OptL...47.4881D
- Keywords:
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- Physics - Optics;
- Condensed Matter - Mesoscale and Nanoscale Physics
- E-Print:
- 5 pages, 7 figures