Issue 32, 2024

Emergent multi-field interaction in a magnetic quasi-two-dimensional WSe2/SrCoO2.5/2DEG heterojunction

Abstract

WSe2-based heterostructures are extensively enhanced by dielectric and interfacial engineering for high-performance photodetectors. However, it is difficult to integrate a magnetic three-dimensional (3D) thin film on the two-dimensional (2D) van der Waals heterostructure. In this study, a magnetic 2D p-WSe2/n-2DEG heterostructure with an inserted epitaxial SrCoO2.5 thin film is fabricated, and a p–n heterojunction is formed via an Ar+-ion-bombardment process. The fabricated device with a typical long depletion region responds to a broad spectral range from 447–808 nm within the wide temperature range of 10–300 K. In the dark and under light illumination, the magneto-optical response can be realized due to the self-charging process in the device. Furthermore, the adjustable multistate can be expected under multi-field interaction on the heterojunction, which can be controlled by the control signal as the light ON/OFF switching, bias, and magnetic field. Based on the experimental results and process simulation, it is demonstrated that the heterojunction with an optimized magnetic SrCoO2.5 design holds promise as a multimode logic gate, which can be implemented with complementary 2D/3D semiconductor design and fabrication processes.

Graphical abstract: Emergent multi-field interaction in a magnetic quasi-two-dimensional WSe2/SrCoO2.5/2DEG heterojunction

Supplementary files

Article information

Article type
Paper
Submitted
06 Jūn. 2024
Accepted
06 Jūl. 2024
First published
08 Jūl. 2024

J. Mater. Chem. C, 2024,12, 12582-12588

Emergent multi-field interaction in a magnetic quasi-two-dimensional WSe2/SrCoO2.5/2DEG heterojunction

X. Zhang, C. Xu, G. Sun, K. Li, H. Yang, G. Liu, Y. Jiang, J. Gao, H. Lu, R. Zhao and W. Tian, J. Mater. Chem. C, 2024, 12, 12582 DOI: 10.1039/D4TC02341B

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