Affiliation
Aix-Marseille Université, CNRS,
Talk Title
1D and 2D Quantum Topological Group IV Artificial Materials Created by Design
Abstract
Silicene, the silicon-based artificial monoelemental counterpart of graphene, is the first
synthetic two-dimensional (2D) Dirac material created in 2012. Its legacy, coined Xenes, are
new 2D allotropes of a number of elements from B to Te. From column IV elements,
silicene, germanene, stanene, and plumbene have sizeable spin-orbit couplings, allowing for
the quantum spin Hall effect, possibly even above room temperature.
Quantum spin Hall insulators (2D topological insulators) generate enormous interest with the
prospects of breakthrough applications from Field-Effect Transistors to spintronics and
quantum computation.
Here, I will compare emergent properties and outstanding multifaceted outcomes of
-i- tailored single phase germanene and stanene sheets formed in situ under ultra-high vacuum on Al(111) and on Ag(111) or Pd(111) respectively, offering, e.g., strinking prospects for topological thermoelectrics, and
-ii- different massively parallel silicon nanoribbons (SiNRs) grown on two noble metal substrates with practically the same lattice parameter, namely, Au(110) and Ag(110), and possible applications of this taxonomy of SiNRs, typically as 1D helical channels in future devices.
-i- tailored single phase germanene and stanene sheets formed in situ under ultra-high vacuum on Al(111) and on Ag(111) or Pd(111) respectively, offering, e.g., strinking prospects for topological thermoelectrics, and
-ii- different massively parallel silicon nanoribbons (SiNRs) grown on two noble metal substrates with practically the same lattice parameter, namely, Au(110) and Ag(110), and possible applications of this taxonomy of SiNRs, typically as 1D helical channels in future devices.