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Atomic and electronic reconstruction at van der Waals interface in twisted 2D materials

2020.12.08 15:01

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장소 online 
일시 Dec. 11 (Fri.), 04:00 PM 
연사 Hyobin Yoo(Sogang Univ.) 

 

SRC Seminar

 

 

 

 

 

“Atomic and electronic reconstruction at van der Waals interface in twisted 2D materials”

 

 

 

Dr. Hyobin Yoo

 

Department of Physics, Sogang University

 

 

 

Dec. 11 (Fri.), 04:00 PM

 

Online seminar

 

https://kaist.zoom.us/j/89400733670
회의 ID: 894 0073 3670
암호: 703454

 

 

 

 

 

 

 

Abstract:

 

Interfaces between crystalline materials have been an essential engineering platform for modern electronics. At the interfaces formed by stacking two different two-dimensional (2D) van der Waals (vdW) crystals, one can freely control the stacking angle between the two layers to create an artificial moire superlattice and access the exotic electronic states. More interestingly, the interplay between interlayer commensurability and intralayer lattice distortion induces atomic scale reconstruction at the interface, creating arrays of commensurate domains with emergent physical functionalities. In this talk, we will discuss how one can design and engineer the atomic scale reconstruction at the interface to imprint novel functionalities. We will also discuss the experimental methodology of combining atomic resolution electron microscopy and modern semiconductor device fabrication technique to elucidate the connection between crystal symmetry and engineered domain structures with the emergent functionalities.

 

 

 

 

Contact: SunYoung Choi, (sunyoungchoi@kaist.ac.kr)

Center for Quantum Coherence in Condensed Matter, KAIST

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