@article{a64f5b4abf01472eafa73db0240d5d9a,
title = "Salt-Assisted Selective Growth of H-phase Monolayer VSe2with Apparent Hole Transport Behavior",
abstract = "Vanadium diselenide (VSe2) exhibits versatile electronic and magnetic properties in the trigonal prismatic (H-) and octahedral (T-) phases. Compared to the metallic T-phase, the H-phase with a tunable semiconductor property is predicted to be a ferrovalley material with spontaneous valley polarization. Herein we report an epitaxial growth of the monolayer 2D VSe2 on a mica substrate via the chemical vapor deposition (CVD) method by introducing salt in the precursor. Our first-principles calculations suggest that the monolayer H-phase VSe2 with a large lateral size is thermodynamically favorable. The honeycomb-like structure and the broken symmetry are directly observed by spherical aberration-corrected scanning transmission electron microscopy (STEM) and confirmed by giant second harmonic generation (SHG) intensity. The p-type transport behavior is further evidenced by the temperature-dependent resistance and field-effect device study. The present work introduces a new phase-stable 2D transition metal dichalcogenide, opening the prospect of novel electronic and spintronics device design.",
author = "Jiawen You and Jie Pan and Shunli Shang and Xiang Xu and Zhenjing Liu and Jingwei Li and Hongwei Liu and Ting Kang and Mengyang Xu and Shaobo Li and Deqi Kong and Wenliang Wang and Zhaoli Gao and Xing Zhou and Tianyou Zhai and Liu, {Zi Kui} and Kim, {Jang Kyo} and Zhengtang Luo",
note = "Funding Information: Z.L. acknowledges supports by Research Grant Council (RGC) of Hong Kong SAR - (No. 16304421), and the IER foundation (HT-JD-CXY-201907), “International science and technology cooperation projects” of Science and Technological Bureau of Guangzhou Huangpu District (2019GH06), Guangdong Science and Technology Department (Project#:2020A0505090003), and Hong Kong Scholar Program (No. XJ2019060). Z.L. acknowledge Research Fund of Guangdong-Hong Kong-Macao Joint Laboratory for Intelligent Micro-Nano Optoelectronic Technology (No. 2020B1212030010). Guangdong Provincial Key Laboratory of Semiconductor Micro Display (No. 2020B121202003). Z.G. thanks the support from the Research Grant Council of Hong Kong (Project No. 24201020 and 14207421), the Key-Area Research and Development Program of Guangdong Province (Grant No. 2020B0101030002), the National Natural Science Foundation of China (Project No. 62101475), and the Research Matching Grant Scheme of Hong Kong Government (Project No. 8601547). Technical assistance from the Materials Characterization and Preparation Facilities, Nanosystem Fabrication Facility of HKUST is greatly appreciated. We also sincerely thank Prof. Michael Altman from the Department of Physics and Prof. Qiming Shao form the Department of Electronic Computer Engineering of HKUST for their suggestions about ferromagnetism. Publisher Copyright: {\textcopyright} 2022 American Chemical Society.",
year = "2022",
month = dec,
day = "28",
doi = "10.1021/acs.nanolett.2c04133",
language = "English (US)",
volume = "22",
pages = "10167--10175",
journal = "Nano Letters",
issn = "1530-6984",
publisher = "American Chemical Society",
number = "24",
}