物理学进展

物理学进展 ›› 2024, Vol. 44 ›› Issue (1): 1-8.doi: 10.13725/j.cnki.pip.2024.01.001

所属专题： 2023年, 第43卷

• •    下一篇

黑磷中基于热驱动金属扩散诱导的相变

  

  1. 1. 南京大学物理学院, 固体微结构物理国家重点实验室，南京 210093 ； 2. 南方科技大学物理系，深圳市新型量子功能材料与器件重点实验室，深圳 518055
  • 出版日期:2024-02-20 发布日期:2024-02-27
  • 基金资助:
    国家重点研发计划项 目 (2022YFA1402500)、国家自然科学基金项目 (62122036、 62034004、61921005、61974176、62204112)、中国科 学院战略重点研究项目 (XDB44000000)、以及江苏省自然科学基金项目 (BK20220774) 的资助。

Phase Transition in Black Phosphorus Induced by Thermal Driven Diffusion of Metal

  1. 1. Nanjing National Laboratory of Microstructures, School of Physics, Nanjing University, Nanjing 210093, China; 2. Department of Physics and Shenzhen Key Laboratory of Advanced Quantum Functional Materials and Devices, Southern University of Science and Technology, Shenzhen 518055, China
  • Online:2024-02-20 Published:2024-02-27

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摘要：

二维 (2D) 材料具有原子级平整、可范德华堆叠集成的性质，同时蕴含了丰富的物理现象与 优异的电学性质，对其相变行为的研究一直是凝聚态物理与材料科学领域的前沿。本研究中，我 们在黑磷 (BP) 中首次实现了基于热驱动金属扩散诱导的阶段式可控相变。通过对 BP-In 界面 的热退火处理，我们观察到了从 BP 纯相到 BP/InP 混合相，再到 InP 纯相的阶段式相变现象。 利用透射电子显微与拉曼光谱等表征技术，我们对诱导相变产生的机制进行了深入剖析，揭示了 BP-In 中热驱动的金属扩散行为是诱导相变发生的主要原因。通过对热驱动中影响能量供给的两 个自由度 (温度与时间) 的精准调控，得到了阶段式相变过程中两个关键的阈值温度 (相变启动与 实现纯相转变) 分别为 300 与 350 °C。本研究为 2D 材料体系中相变工程相关的研究提供了新的 思路，也为拓展 BP 在电子学与光电子学器件中的应用提供了更多的可能性。

关键词: BP, 金属扩散, 相变, 透射电子显微, 拉曼光谱

Abstract:

Two-dimensional (2D) materials are atomically flat and can be stacked into van der Waals heterostructures, as well as contain abundant physical phenomena and excellent electrical properties. The study of phase transition behavior of 2D materials has been the frontier of condensed matter physics and materials science. In our study, the stage-controlled phase transition induced by thermal-driven metal diffusion in black phosphorus (BP) is realized for the first time. Through thermal annealing treatment of the BP-In interface, the phase transition phenomenon from BP pure phase to BP/InP mixed phase and then to InP pure phase is observed. Combined with the characterization techniques of transmission electron microscopy and Raman spectroscopy, the mechanism responsible for phase transition is deeply analyzed, revealing that the thermal-driven metal diffusion behavior in BP-In is the main inducement of phase transition. The two key threshold temperatures (initiation of phase transition and transformation of pure phase) during the stepwise phase transition are obtained by manipulating the two degrees of freedom (temperature and time) which affect the energy supply in the thermal driving, where are 300 and 350 °C , respectively. This study provides more possibilities for expanding the applications of BP-based electronic and optoelectronic devices. 

Key words: black phosphorus(BP), metal diffusion, phase transition, transmission electron microscopy, Raman spectrum

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