中国物理B ›› 2025, Vol. 34 ›› Issue (6): 66102-066102.doi: 10.1088/1674-1056/adc65f

所属专题： SPECIAL TOPIC — Structures and properties of materials under high pressure

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Layer-dependent structural stability and electronic properties of CrPS4 under high pressure

Jian Zhu(朱健)1, Dengman Feng(冯登满)1, Liangyu Wang(王亮予)1, Liang Li(李亮)1, Fangfei Li(李芳菲)1, Qiang Zhou(周强)1,†, and Yalan Yan(闫雅兰)2,‡   

  1. 1 Synergetic Extreme Condition High-Pressure Science Center, State Key Laboratory of Superhard Materials, College of Physics, Jilin University, Changchun 130012, China;
    2 Institute for Interdisciplinary Biomass Functional Materials Studies, Jilin Provincial Key Laboratory of Straw-Based Functional Materials, Jilin Engineering Normal University, Changchun 130052, China
  • 收稿日期:2025-01-09 修回日期:2025-03-07 接受日期:2025-03-28 出版日期:2025-05-16 发布日期:2025-05-16
  • 通讯作者: Qiang Zhou, Yalan Yan E-mail:Zhouqiang@jlu.edu.cn;yanyalan15@163.com
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant Nos. 12074141, 12274168, and 12104180) and the National Major Science Facility Synergetic Extreme Condition User Facility Achievement Transformation Platform Construction (Grant No. 2021FGWCXNLJSKJ01).

Layer-dependent structural stability and electronic properties of CrPS4 under high pressure

Jian Zhu(朱健)1, Dengman Feng(冯登满)1, Liangyu Wang(王亮予)1, Liang Li(李亮)1, Fangfei Li(李芳菲)1, Qiang Zhou(周强)1,†, and Yalan Yan(闫雅兰)2,‡   

  1. 1 Synergetic Extreme Condition High-Pressure Science Center, State Key Laboratory of Superhard Materials, College of Physics, Jilin University, Changchun 130012, China;
    2 Institute for Interdisciplinary Biomass Functional Materials Studies, Jilin Provincial Key Laboratory of Straw-Based Functional Materials, Jilin Engineering Normal University, Changchun 130052, China
  • Received:2025-01-09 Revised:2025-03-07 Accepted:2025-03-28 Online:2025-05-16 Published:2025-05-16
  • Contact: Qiang Zhou, Yalan Yan E-mail:Zhouqiang@jlu.edu.cn;yanyalan15@163.com
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant Nos. 12074141, 12274168, and 12104180) and the National Major Science Facility Synergetic Extreme Condition User Facility Achievement Transformation Platform Construction (Grant No. 2021FGWCXNLJSKJ01).

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摘要： Interlayer coupling plays an important role in determining the lattice vibrations and optical properties of two-dimensional (2D) materials. By applying pressure, the interlayer coupling in 2D materials can be effectively modified, thereby tuning their physical properties. In this study, we systematically investigated the crystal structure and electronic structure of bulk and ultrathin CrPS$_{4}$ by combining in situ high-pressure Raman and photoluminescence (PL) spectroscopy measurements. The results of high-pressure Raman spectroscopy indicate that, with an increase in layer number, the pressure at which the A$_{2}$ and B$_{3}$ Raman peaks merge into a single peak increases, meanwhile, a delay in fluorescence quenching is observed. These can be attributed to the much harder structural distortion or even phase transitions, and the electronic phase transition of CrPS$_{4}$ with stronger interlayer coupling in thicker layer. The current structural and optical investigation under pressure will provide a firm basis for future studies and applications of atomically thin magnetic semiconductors, which hold potential for the development of strain-sensitive and optical-sensing devices.

关键词: CrPS$_{4}$, high pressure, Raman spectroscopy, lattice structural, electronic structure

Abstract: Interlayer coupling plays an important role in determining the lattice vibrations and optical properties of two-dimensional (2D) materials. By applying pressure, the interlayer coupling in 2D materials can be effectively modified, thereby tuning their physical properties. In this study, we systematically investigated the crystal structure and electronic structure of bulk and ultrathin CrPS$_{4}$ by combining in situ high-pressure Raman and photoluminescence (PL) spectroscopy measurements. The results of high-pressure Raman spectroscopy indicate that, with an increase in layer number, the pressure at which the A$_{2}$ and B$_{3}$ Raman peaks merge into a single peak increases, meanwhile, a delay in fluorescence quenching is observed. These can be attributed to the much harder structural distortion or even phase transitions, and the electronic phase transition of CrPS$_{4}$ with stronger interlayer coupling in thicker layer. The current structural and optical investigation under pressure will provide a firm basis for future studies and applications of atomically thin magnetic semiconductors, which hold potential for the development of strain-sensitive and optical-sensing devices.

Key words: CrPS$_{4}$, high pressure, Raman spectroscopy, lattice structural, electronic structure

中图分类号:  (Crystallographic aspects of phase transformations; pressure effects)

  • 61.50.Ks
07.35.+k (High-pressure apparatus; shock tubes; diamond anvil cells) 74.25.nd (Raman and optical spectroscopy) 78.55.-m (Photoluminescence, properties and materials)