Speaker: Dr. Harold Hwang, Stanford University

Speaker:  Dr. Harold Hwang, Stanford University, SLAC National Accelerator Laboratory

Subject:  Soft chemistry approaches to superconductivity in infinite layer nickelates

Abstract: Since their discovery, superconductivity in cuprates has motivated the search for
materials with analogous electronic or atomic structure. We have used soft chemistry approaches
to synthesize superconducting infinite layer nickelate thin films from their perovskite precursor
phase, using topotactic reactions. We will present the synthesis and transport properties of the
nickelates, observation of a doping-dependent superconducting dome in (Nd,Sr)NiO2, and our
current understanding of the electronic structure

Biography:

Harold Y. Hwang is a Professor of Applied Physics and Photon Science (SLAC) at Stanford University, and the
Director of the Stanford Institute for Materials and Energy Sciences. He received a B.S. in Physics, B.S. and M.S. in
Electrical Engineering from MIT (1993), and a Ph.D. in Physics from Princeton University (1997). He was formerly a Member of Technical Staff at Bell Labs (1996-2003) and Professor at the University of Tokyo (2003-2010). His current research focuses
on correlated electrons and emergent phenomena at artificial interfaces and in confined systems; atomic-scale synthesis of
heterostructures of quantum materials; low-dimensional superconductivity; oxide heterostructures for energy applications; and novel devices based on interface states. Recognitions include the MRS Outstanding Young Investigator Award (2005), the IBM Japan Science Prize (Physics, 2008), Fellowship in the American Physical Society (2011), the Ho-Am Prize (Science, 2013), and the Europhysics Prize (2014, with Jochen Mannhart and Jean-Marc Triscone)