Materials Science and Engineering Colloquium
Date: January 29, 2015 from 10:30 am to 11:30 am EST
Location: Columbia University
Morningside Campus
S.W. Mudd
Room 214
Contact: For further information regarding this event, please contact APAM Department by sending email to seasinfo.apam@columbia.edu or by calling 212-854-4457.
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Bookmark and Share "Building Correlated Quantum Materials by the Design of Interfaces"

Jian Liu
Department of Physics, University of California, Berkeley
Materials Science Division, Lawrence Berkeley National Laboratory

As our society has been transformed by materials discovery since ancient times, modern technologies are dominated by interface-derived materials, such as semiconductor heterojunctions. To hunt for the next generation of functional materials, oxide heterostructures are an emerging frontier in material physics research. Complex oxides are a class of quantum materials where the electrons strongly interact with each others and self-organize into a diverse variety of intriguing competing phases, such as superconductivity, magnetism, and multiferroics. Interfacing oxides with distinct ground states provides a fascinating platform at nanoscale for controlling, designing and artificially creating innovative correlated systems that are unobtainable by conventional solid state chemistry. To illustrate the utilization of the entangled charge, spin, and orbital degrees of freedom of correlated electrons, this talk will show from my recent work examples of interface-derived oxides, including hetero-iridates and hetero-nickelates, which are developed to drive metal-insulator transition, orbital polarization, magnetic dynamics, and magnetoelectric effect. Experimental approaches key to materials discovery at interfaces, such as atomic layering growth and resonant x-ray spectroscopy/scattering will be introduced. I will also discuss future directions centering around the one-unit-cell concept as well as cross disciplinary directions intersecting with other fields. To accelerate quantum materials discovery, renovation of strategy for oxide heterostructures research via integrating advanced characterizations and computational materials design will be emphasized.

Host: Irving Herman