Spectroscopy of monolayer and multilayer tungsten disulfide under high pressure

Luo，Jie Huan1; Li，Chen Kai1; Liu，Jing Yi1; Liu，Yao Yao2; Xiao，Wei Heng1; Zheng，Rong Hao1; Zheng，Qunfei1; Han，Jun1; Zou，Tong1; Cheng，Wen Jing1; Yao，Xiao Dong1; Liu，Ying1,3; Zhu，Jinlong1,3

2024-01-15

10.1063/5.0188140

Applied Physics Letters   影响因子和分区

0003-6951

Recently exfoliated monolayer and multilayered transition metal dichalcogenides have gathered significant interest based on their tunable bandgap and extremely high carrier mobility. We have investigated the Raman and photoluminescence spectra of monolayer and multilayer WS as a function of pressure. The Raman-inactive mode B, which is activated by structural disorder, was revealed at 6.7 GPa in monolayers, at 8.0 GPa in bilayers, and at 13.7 GPa in multilayers, respectively. With the enhancement of pressure-induced interlayer interaction, the crystal phase transition due to layer sliding like 2H to 2H occurs at 14.8 and 18.7 GPa in bilayers and multilayers, as evidenced by the split of E and B. The electronic phase transition of the monolayer is supposed to be a direct K-K bandgap changing to an indirect Λ-K bandgap at 2.6 GPa. These observations contribute to a better understanding of the impact of interlayer interactions on the modulation of WS energy bands and structure, as well as fundamental studies of two-dimensional layered materials, which can inform the development of device applications.

SCI ; EI

英语

第一 ; 通讯

PHYSICS

2-s2.0-85182746084

Scopus

1.Department of Physics,Southern University of Science and Technology,Shenzhen,518055,China
2.State Key Laboratory of Electronic Thin Films and Integrated Devices,University of Electronic Science and Technology of China,Chengdu,611731,China
3.Quantum Science Center of Guangdong-Hong Kong-Macao Greater Bay Area (Guangdong),Shenzhen,China

Luo，Jie Huan,Li，Chen Kai,Liu，Jing Yi,et al. Spectroscopy of monolayer and multilayer tungsten disulfide under high pressure[J]. Applied Physics Letters,2024,124(3).

Luo，Jie Huan.,Li，Chen Kai.,Liu，Jing Yi.,Liu，Yao Yao.,Xiao，Wei Heng.,...&Zhu，Jinlong.(2024).Spectroscopy of monolayer and multilayer tungsten disulfide under high pressure.Applied Physics Letters,124(3).

Luo，Jie Huan,et al."Spectroscopy of monolayer and multilayer tungsten disulfide under high pressure".Applied Physics Letters 124.3(2024).