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Cheng-Ching Joseph Wang |
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Education Research
and Teaching Asistant (Physics) Research Interest I am interested in condensed matter theory for the
exotic phenomena emergent from seemly intractable many-body systems. Due to
the difficulty, it is hard to study the problems from the first principle of
quantum mechanics. Therefore, the physics insights gained from the interplay
between experiments and theory are crucial to breakthroughs in this field. In
the past, my research was mainly on classical physics such as wave phenomena
in fluid mechanics, optics, and nonlinear dynamics, which can be viewed as a
hydrodynamic theory for the macroscopic physics of materials. My starting project at The
other interest is the correlation physics in transition metal oxides. Due to
the sensitivity of orders to lattice distortion and relevant details of the
system, we can use density functional theory to describe itinerant electrons
with localized electrons taken cared by effective Hubbard U interaction
(LDA+U). A new phenomenon of
charge reconstruction in transition metal oxide interface is predicted and a
physical picture is proposed to explain the origin and possible observations
in similar materials. Lately,
I am working on the spin susceptibility of Graphene
nanoribbon. In general, I am not so constrained by the
formulation I use but I do favor the quantum field theory approach to study
collective excitations when the ground state is understood. Publications Title: Quantum wells in polar-nonpolar
oxide heterojunction systems Title: Quantum
vortex dynamics in neutral superfluids Title: Effects of Dielectric
Response on the Localization in 1D Periodic-On-Averaged Systems |