scholarly journals ROLE OF PHONONS IN STRUCTURAL PHASE TRANSITIONS OF TRANSITION METAL DICHALCOGENIDES

1981 ◽  
Vol 42 (C6) ◽  
pp. C6-773-C6-775 ◽  
Author(s):  
K. Motizuki ◽  
Y. Yoshida ◽  
Y. Takaoka
Keyword(s):  
Phase Transitions ◽  
Transition Metal ◽  
Structural Phase ◽  
Transition Metal Dichalcogenides ◽  
Structural Phase Transitions ◽  
Metal Dichalcogenides

scholarly journals Structural phase transition and superconductivity hierarchy in 1T-TaS2 under pressure up to 100 GPa

2021 ◽  
Vol 6 (1) ◽  
Author(s):  
Qing Dong ◽  
Quanjun Li ◽  
Shujia Li ◽  
Xuhan Shi ◽  
Shifeng Niu ◽  
...  
Keyword(s):  
Structural Phase ◽  
Transition Metal Dichalcogenides ◽  
Phonon Coupling ◽  
Structural Phase Transitions ◽  
Strong Electron ◽  
Electron Phonon Coupling ◽  
Increasing Trend ◽  
Metal Dichalcogenides ◽  
Dome Shape ◽  
Enhanced Superconductivity

AbstractThe adoption of high pressure not only reinforces the comprehension of the structure and exotic electronic states of transition metal dichalcogenides (TMDs) but also promotes the discovery of intriguing phenomena. Here, 1T-TaS2 was investigated up to 100 GPa, and re-enhanced superconductivity was found with structural phase transitions. The discovered I4/mmm TaS2 presents strong electron–phonon coupling, revealing a good superconductivity of the nonlayered structure. The P–T phase diagram shows a dome shape centered at ~20 GPa, which is attributed to the distortion of the 1T structure. Accompanied by the transition to nonlayered structure above 44.5 GPa, the superconducting critical temperature shows an increasing trend and reaches ~7 K at the highest studied pressure, presenting superior superconductivity compared to the original layered structure. It is unexpected that the pressure-induced re-enhanced superconductivity was observed in TMDs, and the transition from a superconductor with complicated electron-pairing mechanism to a phonon-mediated superconductor would expand the field of pressure-modified superconductivity.

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.

The role of electron-phonon interactions on the coherence lifetime of monolayer transition metal dichalcogenides

2017 ◽  
Vol 266 ◽  
pp. 30-33
Author(s):  
C.E. Stevens ◽  
P. Dey ◽  
J. Paul ◽  
Z. Wang ◽  
H. Zhang ◽  
...  
Keyword(s):  
Transition Metal ◽  
Transition Metal Dichalcogenides ◽  
Metal Dichalcogenides

scholarly journals Non-equilibrium Structural Phase Transformations in Atomically Thin Transition Metal Dichalcogenides

2020 ◽  
Vol 26 (S2) ◽  
pp. 632-633
Author(s):  
Pawan Kumar ◽  
James Horwath ◽  
Alexandre Foucher ◽  
Chrisopher Price ◽  
Natalia Acero ◽  
...  
Keyword(s):  
Transition Metal ◽  
Phase Transformations ◽  
Structural Phase ◽  
Transition Metal Dichalcogenides ◽  
Metal Dichalcogenides ◽  
Structural Phase Transformations ◽  
Non Equilibrium

scholarly journals Nanoscale Friction Behavior of Transition-Metal Dichalcogenides: Role of the Chalcogenide

ACS Nano ◽  
2020 ◽  
Vol 14 (11) ◽  
pp. 16013-16021 ◽  
Author(s):  
Mohammad R. Vazirisereshk ◽  
Kathryn Hasz ◽  
Meng-Qiang Zhao ◽  
A. T. Charlie Johnson ◽  
Robert W. Carpick ◽  
...  
Keyword(s):  
Transition Metal ◽  
Transition Metal Dichalcogenides ◽  
Friction Behavior ◽  
Nanoscale Friction ◽  
Metal Dichalcogenides

Role of graphene and transition metal dichalcogenides as hole transport layer and counter electrode in solar cells

2019 ◽  
Vol 44 (3) ◽  
pp. 1464-1487 ◽  
Author(s):  
Muhammad Zahir Iqbal ◽  
Jameel‐Un Nabi ◽  
Saman Siddique ◽  
Hafiz Taimoor Ahmed Awan ◽  
Syed Shabhi Haider ◽  
...  
Keyword(s):  
Solar Cells ◽  
Transition Metal ◽  
Counter Electrode ◽  
Transition Metal Dichalcogenides ◽  
Hole Transport ◽  
Transport Layer ◽  
Hole Transport Layer ◽  
Metal Dichalcogenides
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