Abstract

We built a Cu–MoTe₂–Cu device model and used first-principles density functional theory to study the transport properties of the T_d-MoTe₂ heterojunction. We obtained the effect of strain on the energy band structure of the bulk T_d-MoTe₂, the transport properties, and photocurrent of the Cu–MoTe₂–Cu device. The strain-induced photocurrent shows an anisotropy that reflects the modulation of the energy bands, including the Weyl point, by strain. The photocurrent can be suppressed to almost zero when the strain is applied along the vacuum direction. In contrast, the photocurrent can be significantly increased when the strain is applied along the transport direction. The transport properties and magnitude of the photocurrent in the MoTe₂-based device can be effectively modulated by adjusting the strength and direction of the strain.

© 2022 Optica Publishing Group

Strain modulation of photocurrent in Weyl semimetal TaIrTe₄

Ying Ding, Xinru Wang, Liehong Liao, Xinyu Cheng, Jiayan Zhang, Yueyue Wang, Hao Ying, and Yuan Li
Opt. Lett. 47(19) 4881-4884 (2022)

Directional dependent magnetooptical effect and the photonic spin Hall effect in a magnetic Weyl semimetal-based photonic crystal

Haixia Da, Qi Song, and Huapeng Ye
Opt. Lett. 47(17) 4359-4362 (2022)

Network analysis of Weyl semimetal photogalvanic systems

Haokun Luo, Yufei Jia, Fugu Tian, Mercedeh Khajavikhan, and Demetrios Christodoulides
Opt. Lett. 47(10) 2450-2453 (2022)

Dirac–Weyl semimetal in photonic metacrystals

Sheng Long, Jie Yang, Hanyu Wang, Zhide Yu, Biao Yang, Qinghua Guo, Yuanjiang Xiang, Lingbo Xia, and Shuang Zhang
Opt. Lett. 48(9) 2349-2352 (2023)

Weyl semimetal integrated three-unit polarimeters

Fugu Tian, Yufei Jia, Haokun Luo, Hasitha Suriya Arachchige, David Mandrus, Jia Grace Lu, Demetrios N. Christodoulides, and Mercedeh Khajavikhan
Optica 9(10) 1115-1120 (2022)