Characterization of Atomic Scale Lattice Reconstruction in Twisted van der Waals Interfaces of Layered Materials



Philip Kim, PhD
Physics and Applied Physics
Harvard University

Friday, May 17, 2019, 4:00 pm | B11 Kimball Hall
Refreshments at 3:30 pm | 116 Upson Hall

Control of the interlayer twist of van der Waals (vdW) interfaces has been widely used to engineer an
artificial 2-dimensional (2D) electronic systems by the formation of a moiré superlattice. Many exotic
physical phenomena occur associated with the incommensurability of the moiré superstructures where
the wealth of the nontrivial topology of electronic band structures plays a key role to create exotic physical
phenomena. In this presentation, we will discuss the engineered atomic scale reconstruction at twisted
vdW interfaces using electron microscopy, optical spectroscopy, and electrical transport. We then will
discuss emerging electronic and optoelectronic physics in the vdW interface between homojunctions.

Professor Philip Kim received his B.S. in physics at Seoul National University in 1990 and received his
Ph.D. in Applied Physics from Harvard University in 1999. He was Miller Postdoctoral Fellow in Physics
from University of California, Berkeley during 1999-2001. He then joined in Department of Physics at
Columbia University as a faculty member during 2002-2014. Since 2014, he moved to Harvard University,
where he is a Professor of both Physics, and Applied Physics.

The focus of Prof. Kim's group research is the mesoscopic investigation of transport phenomena, particularly,
electric, thermal and thermoelectrical properties of low dimensional nanoscale materials. These
materials include carbon nanotubes, organic and inorganic nanowires, 2-dimensional mesoscopic single
crystals, and single organic molecules.

Professor Kim has received numerous honors and awards including the Oliver E. Buckley Prize (2014)
from the American Physical Society.