Please use this identifier to cite or link to this item: https://doi.org/10.1088/1742-6596/864/1/012033
Title: Exciton spectrum in two-dimensional transition metal dichalcogenides: The role of Diracness
Authors: Trushin, M 
Goerbig, M.O
Belzig, W
Keywords: Calculations
Electrons
Linear equations
Quantum theory
Relativity
Transition metals
Ab initio calculations
Coulomb attraction
Dirac equations
Electron hole pairs
Exciton spectra
Quantum mechanical
Spectroscopic measurements
Transition metal dichalcogenides
Excitons
Issue Date: 2017
Citation: Trushin, M, Goerbig, M.O, Belzig, W (2017). Exciton spectrum in two-dimensional transition metal dichalcogenides: The role of Diracness. Journal of Physics: Conference Series 864 (1) : 12033. ScholarBank@NUS Repository. https://doi.org/10.1088/1742-6596/864/1/012033
Rights: Attribution 4.0 International
Abstract: The physics of excitons, electron-hole pairs that are bound together by their mutual Coulomb attraction, can to great extent be understood in the framework of the quantum-mechanical hydrogen model. This model has recently been challenged by spectroscopic measurements on two-dimensional transition-metal dichalchogenides that unveil strong deviations from a hydrogenic spectrum. Here, we show that this deviation is due to the particular relativistic character of electrons in this class of materials. Indeed, their electrons are no longer described in terms of a Schr�dinger but a massive Dirac equation that intimately links electrons to holes. Dirac excitons therefore inherit a relativistic quantum spin-1/2 that contributes to the angular momentum and thus the exciton spectrum. Most saliently, the level spacing is strongly reduced as compared to the hydrogen model, in agreement with spectroscopic measurements and ab-initio calculations.
Source Title: Journal of Physics: Conference Series
URI: https://scholarbank.nus.edu.sg/handle/10635/179464
ISSN: 17426588
DOI: 10.1088/1742-6596/864/1/012033
Rights: Attribution 4.0 International
Appears in Collections:Elements
Staff Publications

Show full item record
Files in This Item:
File Description SizeFormatAccess SettingsVersion 
10_1088_1742-6596_864_1_012033.pdf3.12 kBAdobe PDF

OPEN

NoneView/Download

SCOPUSTM   
Citations

2
checked on Apr 11, 2021

Page view(s)

39
checked on Apr 15, 2021

Google ScholarTM

Check

Altmetric


This item is licensed under a Creative Commons License Creative Commons