Different structure models of group IV element monolayer

Date: 18 January 2017

Venue: UAntwerpen, Campus Groenenborger, Building U, room U.241 - Groenenborgerlaan 171 - 2020 Antwerpen (route: UAntwerpen, Campus Groenenborger)

Time: 4:00 PM - 5:00 PM

Organization / co-organization: Condensed Matter Theory group

Short description: Condensed Matter Theory seminar presented by Linyang Li (CMT group)

Since monolayer graphene was successfully realized in 2004, its unusual Dirac cone band structure has attracted great attention. Its honeycomb lattice with perfect hexagonal symmetry plays a crucial role in the formation of the Dirac cone with linear dispersion. Similarly, other group IV element Si (Ge/Sn) monolayer with a hexagonal honeycomb lattice was proposed, called as silicene (germanene/stanene). In experiment, they were successfully synthesized on different substrates. Besides the hexagon structure, another stable structure model, dumbbell structure, was applied on the element Si (Ge/Sn) monolayer, which exhibits a lower energy than that of the hexagon structure.

In this talk, Linyang Li will compare the structure, energy and band structure of the silicene with dumbbell and hexagon structures and some our new results on dumbbell structure will be shown.

Contact email: lucian.covaci@uantwerpen.be

Link: http://cmt.uantwerpen.be