Recent developments in 2D transition metal dichalcogenides: phase transition and applications of the (quasi-)metallic phases

2021 ◽  
Author(s):  
Xinmao Yin ◽  
Chi Sin Tang ◽  
Yue Zheng ◽  
Jing Gao ◽  
Jing Wu ◽  
...  
Keyword(s):  
Phase Transition ◽  
Transition Metal ◽  
Transition Metal Dichalcogenides ◽  
Metallic Phase ◽  
Developmental Trends ◽  
Recent Developments ◽  
Metal Dichalcogenides

This review outlines the semiconducting-(quasi)metallic phase transition of 2D-TMDs and discusses current developments in the application of this unique phase. Challenges and future developmental trends of TMD-based systems are also highlighted.

scholarly journals Strain Induced Phase Transition of WS2 by Local Dewetting of Au/Mica Film upon Annealing

Surfaces ◽  
2020 ◽  
Vol 4 (1) ◽  
pp. 1-8
Author(s):  
Tomasz Kosmala ◽  
Pawel Palczynski ◽  
Matteo Amati ◽  
Luca Gregoratti ◽  
Hikmet Sezen ◽  
...  
Keyword(s):  
Phase Transition ◽  
Transition Metal ◽  
Thermal Annealing ◽  
Tensile Strain ◽  
Structural Phase ◽  
Transition Metal Dichalcogenides ◽  
Proof Of Concept ◽  
Threshold Strain ◽  
Metal Dichalcogenides ◽  
Phase Engineering

Here, we present a proof-of-concept experiment where phase engineering at the nanoscale of 2D transition metal dichalcogenides (TMDC) flakes (from semiconducting 2H phase to metallic 1T phase) can be achieved by thermal annealing of a TMDC/Au/mica system. The local dewetting of Au particles and resulting tensile strain produced on the TMDC flakes, strongly bound to the Au surface through effective S-Au bonds, can induce a local structural phase transition. An important role is also played by the defects induced by the thermal annealing: when vacancies are present, the threshold strain needed to trigger the phase transition is significantly reduced. Scanning photoelectron microscopy (SPEM) was revealed to be the perfect tool to monitor the described phenomena.

Broadband 1T-titanium selenide-based saturable absorbers for solid-state bulk lasers

Nanoscale ◽  
2018 ◽  
Vol 10 (43) ◽  
pp. 20171-20177 ◽  
Author(s):  
Bingzheng Yan ◽  
Baitao Zhang ◽  
Hongkun Nie ◽  
Guoru Li ◽  
Xiaoli Sun ◽  
...  
Keyword(s):  
Phase Transition ◽  
Solid State ◽  
Transition Metal ◽  
Transition Metal Dichalcogenides ◽  
Saturable Absorbers ◽  
Metal Dichalcogenides

1T-titanium selenide (1T-TiSe2), a representative of 1T phase transition metal dichalcogenides (TMDs), exhibits semimetallic behaviour with a nearly zero bandgap structure, which makes it a promising photoelectric material.

Electron-injection driven phase transition in two-dimensional transition metal dichalcogenides

2020 ◽  
Vol 8 (13) ◽  
pp. 4432-4440 ◽  
Author(s):  
Xiangyu Zhou ◽  
Haibo Shu ◽  
Qiuqi Li ◽  
Pei Liang ◽  
Dan Cao ◽  
...  
Keyword(s):  
Phase Transition ◽  
Transition Metal ◽  
Transition Metal Dichalcogenides ◽  
Electron Injection ◽  
Two Dimensional ◽  
Metal Dichalcogenides ◽  
T Phase

Electron injection leads to the transition of two-dimensional MoX2 (X = S, Se, and Te) nanosheets from the semiconducting H phase to semimetallic T′ phase.

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