The First Principle Study: Structural, Electronic, Optical, Phonon and Elastic Properties in Bulk and Monolayer Molybdenum Ditelluride

  • Geoffrey Tse, Dapeng Yu
  • Journal of Nanoelectronics and Optoelectronics, February 2017, American Scientific Publishers
  • DOI: 10.1166/jno.2017.1976

What is it about?

We studied the crystal structure of bulk and monolayer (ML) metal dichalcogenide MoTe2 using ab initio density functional theory (DFT) calculations, while treating the exchange-correlation potential with the Generalized Gradient Approximations (GGA) method. The bulk crystals were found to have the lowest energy for the Rhombohedral perovskite system, with space group D 6 H4(ML = D 3 H1) with P63/MMC, #194 (ML = P6M2, #187) and lattice parameter of a = b = 3.518 Å (ML = 3.518 Å), c = 13.974 Å (ML = 7.604 Å), bond angle of α = β = 90°, γ = 120° . Calculations were performed to investigate the electronic, density of states (DOS), optical, elastic and phonon properties.

Why is it important?

Another masterpiece in the wonder world of nanotechnology in 2017. The majority in PKU focus their work on Molybdenum Disulphide. I was a bit odd that time, and want to try something unusual, and here it is, the bulk and monolayer Molybdenum ditelluride. Thanks to nanolab in PKU for their great support and help, while I was a postdoc in Beijing. Couldn't have done it without them

Perspectives

Dr Geoffrey Tse
Peking University

University of Bedfordshire Research Associate (2016) Peking University Postdoctoral Fellow (2013-2015) University of Manchester Ph.D (2008-2012) UCL M.Eng (2003-2007) Crystallography, DFT, computational simulations,

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http://dx.doi.org/10.1166/jno.2017.1976

The following have contributed to this page: Dr Geoffrey Tse and Dr Geoffrey Tse