News: AEP

two-dimensional semi-conductors, stacked

Researchers trap electrons to create elusive crystal

By: David Nutt

Like restless children posing for a family portrait, electrons won’t hold still long enough to stay in any kind of fixed arrangement. Now, a Cornell-led collaboration has developed a way to stack two-dimensional semiconductors and trap electrons in a repeating pattern that forms a specific and long-hypothesized crystal. The team’s paper, “Correlated Insulating States at Fractional Fillings of Moiré Superlattices,” published Nov. 11 in Nature. The paper’s lead author is postdoctoral researcher Yang Xu. The project grew out of the shared lab of Kin Fai Mak, associate professor of physics in the... Read more

Watt Webb pictured in lab

Watt Webb, biological imaging techniques pioneer, dies

By: Anne Ju Manning

Applied physicist Watt W. Webb, the S.B. Eckert Professor of Engineering Emeritus and a pioneer in methods for imaging living biological systems, died Oct. 29 in New York City. He was 93. Webb was best known as the biophysicist who co-invented fluorescence correlation spectroscopy and multiphoton microscopy – imaging techniques that have revolutionized how scientists observe biological dynamics and structures deep within living tissue. Read the full Cornell Chronicle article. Read more

Rice plants are photographed in the X-ray beamline at the Cornell High Energy Synchrotron Source.

CHESS receives $32.6M from NSF for new X-ray beamline

By: David Nutt

The National Science Foundation has awarded the Cornell High Energy Synchrotron Source (CHESS) $32.6 million to build a High Magnetic Field (HMF) beamline, which will allow researchers to conduct precision X-ray studies of materials in persistent magnetic fields that exceed those available at any other synchrotron. Read the full Cornell Chronicle article. Read more

stem image of tooth

Smile: Atomic imaging finds root of tooth decay

By: David Nutt

A collaboration between researchers from Cornell, Northwestern University and University of Virgina combined complementary imaging techniques to explore the atomic structure of human enamel, exposing tiny chemical flaws in the fundamental building blocks of our teeth. The findings could help scientists prevent or possibly reverse tooth decay. Read the full Chronicle Article here. Read more

muller graphic of empad

Hardware to count every electron and software to make sure every electron counts

Regarding his team's new mixed-state electron ptychography method, Professor David Muller, Samuel B. Eckert Professor of Engineering, says it entails: “hardware to count every electron and software to make sure every electron counts.” Mixed-state electron ptychography uses complex algorithms to achieve faster, less destructive, more efficient imaging with picometer precision. Learn more: "When imaging atoms, blurrier is better". Read more

Professor Jie Shan and Associate Professor Kin Fai Mak

Researchers control elusive spin fluctuations in 2D magnets

Professor Jie Shan and Associate Professor Kin Fai Mak co-author recent paper on a new real-time imaging technique that is fast and sensitive enough to observe elusive critical fluctuations in two-dimensional magnets. This technique allows researchers to control the fluctuations and switch magnetism via a “passive” mechanism that could eventually lead to more energy-efficient magnetic storage devices. The team’s paper, “Imaging and Control of Critical Fluctuations in Two-Dimensional Magnets,” published June 8 in Nature Materials. Learn more in the Cornell Chronicle article here. Read more

image from Fuchs

Acoustics put a fresh spin on electron transitions

By: David Nutt

Fuchs’s group demonstrates spin resonance can be driven solely by acoustics. eliminates need for the magnetic antenna. The team’s paper, “Acoustically Driving the Single Quantum Spin Transition of Diamond Nitrogen-Vacancy Centers,” published May 27 in Physical Review Applied. Read more

etch a sketch

Rewritable magnetic patterning: think tiny Etch A Sketch

By: Syl Kacapyr

AEP Associate Professor Greg Fuchs among the multifaceted team that recently published “Local Photothermal Control of Phase Transitions for On-Demand Room-Temperature Rewritable Magnetic Patterning” in Advanced Materials. The study demonstrates a technique for writing, erasing and rewriting microscopic magnetic patterns onto a material and has applications for ultrafast computer memory. Read the Cornell Chronicle article: "Rewritable magnetic patterning: think tiny Etch A Sketch." Read more