SEMINAR 2024

Engineering the Structure and Properties of 2D Materials by Defects, Strain and Intercalation

Speaker A.V. Krasheninnikov, Institute of Ion Beam Physics and Materials Research, Germany
Date/Time Friday, 6 Sept, 10:30AM
Location Conference room: S11-02-07
Host Prof Andrew Wee

Abstract

As 2D materials have a high surface-to-volume ration, nearly all of them contain defects and impurities, which may have appeared due to the effects of the environment or exfoliation, or in case of synthetic materials, during the growth. The defects can govern the electronic and optical properties of 2D systems. Moreover, defects can intentionally be introduced using beams of energetic particles – ions and electrons. Formation of defects may also give rise to phase transformations in these materials and/or tune their properties. Mechanical strain and intercalation by, e.g., alkali metal atoms, can further be used to tailor the materials characteristics. All of these calls upon the studies on defects and their role upon intercalation, response of materials to strain and irradiation. In my talk, I will present the results of our recent theoretical studies of point and line defects in 2D materials [1-4] obtained in close collaboration with experimental groups. I will further discuss how strain can affect the characteristics of defective 2D materials [5] and how new 2D phases of materials can be created upon atom intercalation between graphene sheets and address the role of defects in this process [6].

  1. F. Long et al., Nano Lett. 23 (2023) 8468.
  2. F.H. Davies, et al., “2D Mater. 11 (2024) 015003.
  3. V. Pathirage, et al., Materials Today Nano 22 (2023) 100314.
  4. F.H. Davies and A. V. Krasheninnikov, Phys. Rev. B 109 (2024) 165442.
  5. P. Santra, et al., npj 2D Materials and Applications 8 (2024) 33.
  6. X. Zhang, et al., Mater. Today Ener. 34 (2023) 101293.

Biography

Dr. Arkady V. Krasheninnikov received his PhD in Solid State Physics from Moscow State Engineering Physics Institute in 1995. He worked as a postdoctoral fellow at the University of Helsinki, Finland in 2001-2004, and later on as a Senior Scientist at Aalto University, Finland. Since 2015 he is a Group Leader at the Institute of Ion Beam Physics and Materials Research, Helmholtz-Zentrum Dresden-Rossendorf, Germany. He was also a Visiting Professor at Danish Technical University and Aalto University, Finland. His scientific interests lie in the areas of computational materials science, electronic structure calculations, two-dimensional materials, and irradiation effects in solids. Throughout his career, he has co-authored about 300 papers cited 34,500+ times (Google Scholar) and gave more than 100 invited talks and seminars. His awards and recognitions include Otto Mønsted Guest Professorship at DTU Nanotech, Denmark, HZDR Research Award, Highly Cited Researcher (Physics) from Clarivate Analytics (2019 –2023); American Physical Society “Outstanding Referee”. See also: