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Theme 3 colloquium: “Electronic structure of novel two-dimensional materials” (Lecture)

Date
Tuesday 20 February 2018Add to my calendar
Time
from 16:00
Location
HG00.304
Speaker
dr. Sasha Rudenko (Theory of Condensed Matter)
Description


Sasha RudenkoTwo-dimensional materials is a rapidly developing field of material science. Hundreds of 2D materias have emerged since the discovery of graphene in 2004. Many of them demonstrate exceptional and highly tunable characteristics, which makes them appealing candidates for practical applications in optics and microelectronics. Apart from that, some of recently emerged 2D materials demonstrate the existence of qualitatively new electronic properties, not typical to other known 2D materials. In this talk I will give a theoretical overview of the electronic properties of novel group V two-dimensional elemental semiconductors. I will first focus on thin-layer black phosphorus, high-mobility semiconductor exhibiting a variety of unique phenomena, such as, for example, hyperbolic optical response and coexistence of normal, Dirac, and topological electronic states. I will pay special attention to the anisotropy of black phosphorus, which plays a decisive role in the formation of its electronic structure. In the second part of the talk, I will consider single-layer antimony, recently discovered 2D semiconductor with exceptionally strong spin-orbit coupling. This quality is shown to be responsible for the unusual behavior of plasmonic excitations, as well as it gives rise to sizeable spin-transport effects (e.g., spin Hall effect), which makes 2D antimony a prospective candidate for spintronics.

Contact
prof. Alex Khajetoorians