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MRSEC Seminar: van der Waals Oxide Heteroepitaxy

Ying-Hao Chu, National Chiao Tung University
Tuesday, May 15, 2018 - 12:30pm to 1:30pm
PAT C-421

In the diligent pursuit of low-power consumption,
multifunctional, and environmentally friendly electronics, more sophisticated
requirements on functional materials are on demand.
For example, flexible electronics represents
a fast developing field and has a great potential to impact our daily life. In
building up flexible electronics, the materials with controllable conduction,
transparency, and good flexibility are required. Recently, the discovery of
free-standing 2D materials has created a revolution to this field. Pioneered by
graphene, these new 2D materials exhibit aboundant unusual physical phenomena
that is undiscovered in bulk forms. In the meantime, it also possesses very
high transparency to the visible light. However, the extensively studied
pristine graphene naturally has no bandgap and become restricted in many
field-effect based applications. Hence, looking for various types of new 2D
materials has been a focal research direction nowadays. In this talk, we intend
to take the same concept, but to integrate a family of functional materials in
order to open new avenue to flexible electronics. Due to the interplay of
lattice, charge, orbital, and spin degrees of freedom, correlated electrons in
oxides generate a rich spectrum of competing phases and physical properties.
However, a generic approach to build up flexible electronics based on
functional oxides is yet to be developed. In this study, we use a 2D material
as the substrate. And we take several functional oxides as a models system to
demonstrate a pathway to build up functional oxides for transparent and
flexible electronics.


[1] Y.
H. Chu
, "van der Waals oxide heteroepitaxy", npj Quant. Mater. 2, 67 (2017).

[2] Y. Bitla and Y. H. Chu, "MICAtronics: A New Platform for Flexible
X-tronics", FlatChem 3, 26 (2017).