@article{Qin2026, 
author = {Jiaze Qin and Chenyin Jiao and Shenghai Pei and Zejuan Zhang and Cheng Li and Junhui Liang and Yu Zhou and Zhenyu Wang and Weizhao Cai and Zenghui Wang and Yanchao Wang and Juan Xia},
title = {Completing the stacking–pressure phase diagram in bilayer MoS2},
year = {2026},
journal = {Nano Research},
volume = {19},
number = {3},
pages = {94908129},
keywords = {Raman spectroscopy, phase transition, stacking-pressure phase diagram, twisted bilayer MoS2},
url = {https://www.sciopen.com/article/10.26599/NR.2025.94908129},
doi = {10.26599/NR.2025.94908129},
abstract = {Pressure-stacking phase diagrams are uniquely important for studying two-dimensional (2D) materials. However, due to experimental challenges, a complete stacking-pressure phase diagram has remained elusive. Here, we complete such phase diagram by growing both naturally-occurring (AA and AB) and artificially-created (stacking angle finely-varying between 0° and 60°) bilayer MoS2 crystals (tBLM), and study the evolution of their Raman modes upon compression. Through detailed analysis of spectral transitions under pressure, we observe a clear contrast in the pressure-induced phase behavior of tBLM in these two categories, uncover a unique metastable phase, and discover a chevron-shaped dependence between transition pressures and the stacking axis. Based on the above findings, we construct a complete and detailed stacking-pressure phase diagram for this bilayer 2D material system. Our findings offer a new approach for exploring and understanding phase transitions in 2D materials under pressure.}
}