Everything is made of something.

The ability to design, synthesize and measure materials with picometer resolution represents an emerging, final frontier in materials science.  Whereas the past two decades have seen remarkable advances in nanoscience and engineering, in which materials are designed and engineered at the 1-100 nm length scale via the control of clusters of atoms, we are now in an era of picoscale materials development, where picometer-scale distortions, including manipulation and control of subtle bond configurations between individual atoms, strongly modify functional behavior in the solid state.  This can result in materials having properties that do not exist in nature.  Picoscience offers the ultimate length scale to engineer materials, since distortions smaller than a single picometer become too small to alter macroscopic material properties.

welcome

Welcome to Ahn Lab

The research group focuses on the fabrication and the study of the physical properties of novel complex oxide materials using advanced growth and characterization techniques, including molecular beam epitaxy and synchrotron x-ray scattering techniques.  Current interests include the physics and technology of multifunctional oxides, nanofabrication and electronic writing using scanning probe microscopies, electronic control of complex order parameters in correlated oxides, and development of nonvolatile logic switches for post-CMOS computing paradigms.

News & Recent Results

New Findings: Identifying crystal structures and chemical reactions at the interface of stanene on Bi2Te3

2020
On October 22, 2020, Stephen D. Albright, Ke Zou, Claudia Lau, Stephen Eltinge, Hawoong Hong, Sohrab Ismail-Beigi, Frederick J. Walker and Charles H. Ahn published “...

Stephen D. Albright defends thesis: "Ultra-thin Film Growth of Chalcogenides to Realize Novel Electronic Phenomena"

2020
On September 17, 2020, Stephen D. Albright successfully defended his thesis, “Ultra-thin Film Growth of Chalcogenides to Realize Novel Electronic Phenomena.”

Yichen Jia defends thesis: "Spin-Dependent Quantum Transport in Epitaxial BaTiO3-Germanium Tunnel Junctions"

2020
On July 20, 2020, Yichen (Eddie) Jia successfully defended his thesis, “Spin-Dependent Quantum Transport in Epitaxial BaTiO3-Germanium Tunnel Junctions.”

New Findings: A comprehensive ARPES study on the type-II Dirac semimetal candidate Ir1−xPtxTe2

2020
On June 8, 2020, Juan Jiang, Sangjae Lee, Fucong Fei, Fengqi Song, Elio Vescovo, Konstantine Kaznatcheev, Fred J. Walker, and Charles H. Ahn published “A comprehensive ARPES...

New Findings: Picoscale structural insight into superconductivity of monolayer FeSe/SrTiO3

2020
On April 8, 2020, Rui Peng, Ke Zou, M. G. Han, Stephen D. Albright, Hawoong Hong, Claudia Lau, H. C. Xu, Yimei Zhu, Fred J. Walker, and Charles H. Ahn published “Picoscale...

Charles Ahn named Materials Research Society Fellow

2020
Charles Ahn, principle investigator of the Ahn Lab and the John C. Malone Professor of Applied Physics, Mechanical Engineering & Materials Science and Physics, has been...

Claudia Lau defends thesis: "Structural characterization of epitaxial oxide heterostructures via X-ray scattering"

2020
On March 10, 2020, Claudia Lau successfully defended her thesis: “Structural characterization of epitaxial oxide heterostructures via X-ray scattering.”