scholarly journals Electron–Hole Plasma‐Induced Dephasing in Transition Metal Dichalcogenides

2021 ◽  
pp. 2100391
Author(s):  
Josefine Neuhaus ◽  
Tineke Stroucken ◽  
Stephan W. Koch
Keyword(s):  
Transition Metal ◽  
Transition Metal Dichalcogenides ◽  
Electron Hole ◽  
Hole Plasma ◽  
Electron Hole Plasma ◽  
Metal Dichalcogenides

Electron-hole plasma formation dynamics observed through exciton-plasma interactions in transition metal dichalcogenides

2021 ◽  
Vol 104 (7) ◽  
Author(s):  
Manobina Karmakar ◽  
Subhrajit Mukherjee ◽  
Samit K. Ray ◽  
Prasanta Kumar Datta
Keyword(s):  
Transition Metal ◽  
Transition Metal Dichalcogenides ◽  
Plasma Formation ◽  
Electron Hole ◽  
Plasma Interactions ◽  
Hole Plasma ◽  
Electron Hole Plasma ◽  
Formation Dynamics ◽  
Metal Dichalcogenides

scholarly journals Prediction of the structural and electronic properties of MoxTi1−xS2 monolayers via first principle simulations

2020 ◽  
Vol 10 ◽  
pp. 184798042095509
Author(s):  
Ankit Kumar Verma ◽  
Federico Raffone ◽  
Giancarlo Cicero
Keyword(s):  
Transition Metal ◽  
Electronic Properties ◽  
Transition Metal Dichalcogenides ◽  
Stable Phase ◽  
Two Dimensional ◽  
Electron Hole ◽  
Effective Electron ◽  
Wide Range ◽  
Structural And Electronic Properties ◽  
Metal Dichalcogenides

Two-dimensional transition metal dichalcogenides have gained great attention because of their peculiar physical properties that make them interesting for a wide range of applications. Lately, alloying between different transition metal dichalcogenides has been proposed as an approach to control two-dimensional phase stability and to obtain compounds with tailored characteristics. In this theoretical study, we predict the phase diagram and the electronic properties of Mo xTi1− xS2 at varying stoichiometry and show how the material is metallic, when titanium is the predominant species, while it behaves as a p-doped semiconductor, when approaching pure MoS2 composition. Correspondingly, the thermodynamically most stable phase switches from the tetragonal to the hexagonal one. Further, we present an example which shows how the proposed alloys can be used to obtain new vertical two-dimensional heterostructures achieving effective electron/hole separation.

scholarly journals Biexcitons fine structure and non-equilibrium effects in transition metal dichalcogenides monolayers from first principles

2021 ◽  
Vol 4 (1) ◽  
Author(s):  
Abderrezak Torche ◽  
Gabriel Bester
Keyword(s):  
Fine Structure ◽  
Transition Metal ◽  
Exchange Interaction ◽  
First Principles ◽  
Transition Metal Dichalcogenides ◽  
Exciton State ◽  
Two Dimensions ◽  
Electron Hole ◽  
Metal Dichalcogenides ◽  
Non Equilibrium

AbstractTransition metal dichalcogenides monolayers host strongly bounded Coulomb complexes such as exciton and trion due to charge confinement and screening reduction in two dimensions. Biexciton, a bound state of two electrons and two holes, has also been observed in these materials with a binding energy which is one order of magnitude larger than its counterpart in conventional semiconductors. Here, using first principles methods, we address the biexciton in WSe2 monolayer and unravel the important role of the electron-hole exchange interaction in dictating the valley character of biexciton states and their fine structure. In particular, the fundamental biexciton transition which is located between the exciton and trion peaks is shown to have a fine structure of 2.8 meV mainly due to the splitting of the dark exciton state under the intervalley electron-hole exchange interaction. Non equilibrium effects are also addressed and optical fingerprints of non-thermalized biexciton population are discussed.

Prediction of an extremely long exciton lifetime in a Janus-MoSTe monolayer

Nanoscale ◽  
2018 ◽  
Vol 10 (41) ◽  
pp. 19310-19315 ◽  
Author(s):  
Hao Jin ◽  
Tao Wang ◽  
Zhi-Rui Gong ◽  
Chen Long ◽  
Ying Dai
Keyword(s):  
Transition Metal ◽  
Separation Efficiency ◽  
Transition Metal Dichalcogenides ◽  
Two Dimensional ◽  
Electron Hole ◽  
Exciton Lifetime ◽  
Key Factor ◽  
Metal Dichalcogenides

The electron–hole separation efficiency is a key factor that determines the performance of two-dimensional (2D) transition metal dichalcogenides (TMDs) and devices.

scholarly journals A rationally designed two-dimensional MoSe2/Ti2CO2 heterojunction for photocatalytic overall water splitting: simultaneously suppressing electron–hole recombination and photocorrosion

2021 ◽  
Author(s):  
Cen-Feng Fu ◽  
Xingxing Li ◽  
Jinlong Yang
Keyword(s):  
Transition Metal ◽  
Water Splitting ◽  
Rational Design ◽  
Transition Metal Dichalcogenides ◽  
Two Dimensional ◽  
Electron Hole ◽  
Photocatalytic Water Splitting ◽  
Overall Water Splitting ◽  
Metal Dichalcogenides ◽  
Hole Recombination

The two challenges of electron–hole recombination and photocorrosion for two-dimensional transition metal dichalcogenides in the application of photocatalytic water splitting are simultaneously suppressed by rational design of heterojunctions.

Investigating the role of dark excitons on electron-hole liquid photoluminescence in monolayer transition-metal dichalcogenides

2021 ◽  
Author(s):  
Ryan Wilmington ◽  
Hossein Ardekani ◽  
Avinash Rustagi ◽  
Alexander Bataller ◽  
Alexander F. Kemper ◽  
...  
Keyword(s):  
Transition Metal ◽  
Transition Metal Dichalcogenides ◽  
Electron Hole ◽  
Metal Dichalcogenides

scholarly journals Metal-insulator transitions in bilayer electron-hole systems in transition metal dichalcogenides

2021 ◽  
Vol 104 (19) ◽  
Author(s):  
S. T. Chui ◽  
Ning Wang ◽  
B. Tanatar
Keyword(s):  
Transition Metal ◽  
Transition Metal Dichalcogenides ◽  
Electron Hole ◽  
Metal Insulator ◽  
Metal Dichalcogenides

BANDS AND BONDS OF INTERCALATION COMPOUNDS OF LAYERED TRANSITION-METAL DICHALCOGENIDES

1988 ◽  
Vol 49 (C8) ◽  
pp. C8-201-C8-202
Author(s):  
N. Suzuki ◽  
Y. Yarnasaki ◽  
K. Motizuki
Keyword(s):  
Transition Metal ◽  
Transition Metal Dichalcogenides ◽  
Intercalation Compounds ◽  
Metal Dichalcogenides ◽  
Layered Transition Metal
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