Adams TY, Barrios B, Ziegenfus M, Cai H, Ghosh S. Light-Induced Lattice Coherence and Emission Enhancement in PTM-Passivated CsSnI3 Perovskites. Advanced Optical Materials. 2025:e02889.
Publications
2025
Onipede B, Metcalf ME, Fletcher N, Cai H. Realizing tunable Fermi level in SnTe by defect control. Journal of Physics: Condensed Matter. 2025.
The tuning of the Fermi level in tin telluride, a topological crystalline insulator, is essential for accessing its unique surface states and optimizing its electronic properties for applications such as spintronics and quantum computing. In this study, we demonstrate that the Fermi level in tin telluride can be effectively modulated by controlling the tin concentration during chemical vapor deposition synthesis. By introducing tin-rich conditions, we observed a blue shift in the X-ray photoelectron spectroscopy core-level peaks of both tin and tellurium, indicating an upward shift in the Fermi level. This shift is corroborated by a decrease in work function values measured via ultraviolet photoelectron spectroscopy, confirming the suppression of Sn vacancies. Our findings provide a low-cost, scalable method to achieve tunable Fermi levels in tin telluride, offering a significant advancement in the development of materials with tailored electronic properties for next-generation technological applications.
2022
Zhou Y, Zhou S, Ying P, Zhao Q, Xie Y, Gong M, Jiang P, Cai H, Chen B, Tongay S, et al. Unusual Deformation and Fracture in Gallium Telluride Multilayers. The journal of physical chemistry letters. 2022;13(17):3831–3839.
Zhou Y, Zhou S, Ying P, Zhao Q, Xie Y, Gong M, Jiang P, Cai H, Chen B, Tongay S, et al. Investigation of Deformation and Fracture Mechanisms in Two-dimensional Gallium Telluride Multilayers Using Nanoindentation. arXiv preprint arXiv:2204.11031. 2022.
Gu Y, Zhang L, Cai H, Liang L, Liu C, Hoffman A, Yu Y, Houston A, Puretzky AA, Duscher G, et al. Stabilized Synthesis of 2D Verbeekite: Monoclinic PdSe2 Crystals with High Mobility and In-Plane Optical and Electrical Anisotropy. ACS nano. 2022.
2021
Guo Y, Lupini AR, Cai H, Xiao K, Krylyuk S, Davydov A, Guo Q, Kalinin S. Automatic detection of crystallographic defects in STEM images by unsupervised learning with translational invariance. Microscopy and Microanalysis. 2021;27(S1):1460–1462.
Guo Y, Kalinin S V, Cai H, Xiao K, Krylyuk S, Davydov A V, Guo Q, Lupini AR. Defect detection in atomic-resolution images via unsupervised learning with translational invariance. npj Computational Materials. 2021;7(1):1–9.
Anton-Solanas C, Waldherr M, Klaas M, Suchomel H, Harder TH, Cai H, Sedov E, Klembt S, Kavokin A V, Tongay S, et al. Bosonic condensation of exciton—polaritons in an atomically thin crystal. Nature materials. 2021;20(9):1233–1239.
2020
Gu Y, Cai H, Dong J, Yu Y, Hoffman AN, Liu C, Oyedele AD, Lin Y-C, Ge Z, Puretzky AA. Two-Dimensional Palladium Diselenide with Strong In-Plane Optical Anisotropy and High Mobility Grown by Chemical Vapor Deposition. Advanced Materials. 2020:1906238.
Guo Y, Kalinin S, Cai H, Xiao K, Krylyuk S, Davydov A, Lupini A. Investigation of Structural Phases in Mo1-xWxTe2 in STEM. Microscopy and Microanalysis. 2020;26(S2):2362–2364.