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Interlayer couplings in two-dimensional materials

Speaker: 
Dr. Ji Wei (Department of Physics, Renmin University of China, Beijing 100872, China)
Date: 
Wed, 14/12/2016 - 2:00pm to 4:00pm
Location: 
Theory Common Room S16-06
Host: 
A/Prof Lu Jiong
Event Type: 
Seminars

Abstract

In this talk, Prof Ji Wei will briefly summarize the recent progresses on the modelling of interlayer interactions of various two-dimensional materials, e.g. weakened van der Waals interaction in twisted graphene1 and ReS22, covalent-like quasi-bonding in PtS23/PtSe24 and BP5,6, and subtle balance between inter- and intra-layer interactions in organic molecules7. In addition, air stability of BP was theoretically and experimentally investigated, which reveals the atomic details for the air degradation of BP8.

References:

1Jiang-Bin Wu et al., ACS Nano 9 (7), pp 7440–7449 (2015).

2Xiaofeng Qiao et al., Nanoscale  8, 8324-8332 (2016) 

3Yuda Zhao et al., Advanced Materials  28 (12), 2399–2407 (2016)   

4Yuda Zhao et al., Advanced Materials, DOI: 10.1002/adma.201604230

5Jingsi Qiao et al., Nature Commun. 5, 5475 (2014)

6Zhxin Hu et al., Nanoscale  8, 2740 (2016)

7Yuhan Zhang et al., Phys. Rev. Lett.  116, 016602 (2016) 

8Yuan Huang et al., Chem. Mater., 28 (22), pp 8330–8339  (2016)

About the Speaker

Dr. JI, Wei is a computational physicist, working in the field of surface and interface modeling of low-dimensional materials. His research interests include surface and interface modeling of emerging electronic materials and devices. Recently, he is interested in theoretical modeling of electronic, optical, and vibrational properties of two-dimensional materials. He has been also developing theoretical methods for describing beam effects in scanning transmission microscope and understanding ultrahigh resolution in noncontact atomic force microscope. He received his Ph.D in condensed matter physics from the Institute of Physics, Chinese Academy of Science in 2008. Prior to joining Renmin University of China, he spent four years in McGill University as a visiting scholar and then a postdoctoral fellow. He was originally appointed as an Associated Professor by Renmin University in 2010 and was early promoted to Full Professor in 2014. He was supported by the national Young Top-Notch Talent Program in 2014 and the National Science Fund for Excellent Young Scholars in 2016, and awarded Chang-Jiang Young Scholars in 2015.  He also serves as trustees in the youth committee and computational materials science division of the Chinese Materials Research Society.

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