报告时间:12月18日(周一)10:00
报告地点:科技创新大楼B113
报告人:Liangzhi Kou
Dirac materials and novel properties in 2D limits
Abstract:Among
the huge family of 2D materials, graphene is the superstar due to extremely
high carrier mobility, high stable and outstanding mechanical strength. One
typical feature of graphene is the linear band dispersion near the Fermi level,
which render it possess high Fermi velocity and high carrier mobility. The
families with the merit are called as Dirac materials.
From first principle calculations, we
found the recent synthesized boron sheet is the stable Dirac layered materials
after surface hydrogenation with high Fermi velocity, and outstanding
mechanical properties. More interesting, the sheet simultaneously exhibit the
phenomena of negative Poisson ratio, ferroelasticity and Dirac switch,
therefore rendering borophane promising in future nanodevice application.
We also suggested that topological
insulators are another family of Dirac materials due to the helical metallic
edge states. With the feasible approaches, we turn graphene into strong
topological insulators with large nontrivial band gaps, and demonstrated the presence of metallic edge states with 1D
Dirac cones.
Curriculum Vitae:
Dr.Liangzhi Kou,
Lecturer of QUT
Birth: 01/Aug/1983
Major: Nano Mechanics/Physics
Email: , liangzhi.kou@qut.edu.au
Research
interests
Topological insulators, 2D and 1D layered materials,
semiconductor surface and nanostructures, ab initio simulations
Professional
experience
Have been an invited reviewer for leading journals in the
fields of Material Science, Physics, and Chemistry for over 100 times
including, Nat. Chem., Adv. Mater., Nat. Commun., ACS Nano.
Publication
Summary
60 high impactac ademic papers have been published, with about1400
citations, including the publications in Nano Lett, ACS Nano; Adv. Mater.; J.
Phys. Chem. Lett; Detailed publication list can be found at Google scholar:
https://scholar.google.com.au/citations?hl=en&user=RGm-YkGGiBoC&view_op=list_works