TMDC
The TMDC also known as Transition Metal Dichalchogenides. It is a family of 2D materials. The common formula for 2d Material is MX2 where M represents the Transition metal like Tungesten, Molybdenum, e.t.c and X represents the chalcogen like sulhpur, selenium, or Tellurium. The bandgap of these materials are tunable. It has indirect bandgap at Bulk and several layers. When it is thinned down to monolayer, the valence band minima and conduction band maxima shift to K-points. So, these materials are useful in optoelectronics because of strong-light matter interaction and direct band gap.
I involved in a project of mapping out the band structure of NiTe2 by the help of photoemission spectroscopy. NiTe2 is a family of TMDC which is dirac semimetal. The electronic structure, below and above the fermi level, is crucial to know the properties of materials. The conventional ARPES can only map out the band structure above fermi level. However, our momentum microscope can map out the band structure below the fermi level.