Cornell researchers have discovered a rare “pseudogap” phenomenon that helps explain how the superconducting transition temperature can be greatly boosted in a single monolayer of iron selenide, and how it might be applied to other superconducting materials.
A Cornell-led collaboration identified an unusual behavior of superfluid helium-3 when it undergoes a phase transition between two different superfluid states – a transition that theoretically shouldn’t happen reliably.
An interdisciplinary team of Cornell researchers has created a cohort of new quantum metamaterials that can achieve superconductivity at temperatures competitive with state-of-the-art solid-state materials synthesis.
The Andrew W. Mellon Foundation has approved a grant of $1.2 million to extend the Mellon Collaborative Studies in Architecture, Urbanism and the Humanities (AUH) interdisciplinary seminar series at Cornell for three years with a focus on social justice.
Neil W. Ashcroft, the Horace White Professor of Physics Emeritus in the College of Arts and Sciences and a leading theorist in condensed matter physics, died March 15 in Ithaca. In the late 1960s and first half of the 1970s, he collaborated with David Mermin, professor emeritus of physics, to write “Solid State Physics,” which became the gold standard of textbooks for their discipline.
On Dec. 19, nearly 1,500 Cornell students celebrated their winter graduation in a virtual recognition ceremony viewed around the world – the first such event at Cornell, and a fitting end to what President Martha E. Pollack called “a semester like no other at Cornell.”
Sometimes atoms, like pets and adventuresome hikers, slip loose and wander off into the wild. Their final destination isn’t known, and their trajectory can be all over the map. It’s not so easy to track their path.
The white blood cell TH17 helps the immune system fight infection by promoting inflammation. But it can be too much of a good thing: Excessive inflammation from TH17 overload has been tied to autoimmune disorders, such as inflammatory bowel disease (IBD) and arthritis.
Arthur Ashkin, Ph.D. ’52, who won the Nobel Prize in physics in 2018 for pioneering “optical tweezers” that use laser light to capture and manipulate microscopic particles, died Sept. 21 at his home in Rumson, N.J. He was 98.
The superfluid helium-3 has many notable qualities. With its low mass and small atomic size, it remains in a liquid state – and when it transforms to the superfluid state, flowing without resistance – down to absolute zero, or minus 459.67 degrees Fahrenheit. It is a pure system, without any disorder. And it is full of surprises.
As with actors and opera singers, when measuring magnetic fields it helps to have range.
Cornell researchers used an ultrathin graphene “sandwich” to create a tiny magnetic field sensor that can operate over a greater temperature range than previous sensors, while also detecting miniscule changes in magnetic fields that might otherwise get lost within a larger magnetic background.
Peter McMahon, assistant professor of applied and engineering physics in the College of Engineering, and Brad Ramshaw, the Dick & Dale Reis Johnson Assistant Professor of Physics in the College of Arts and Sciences, have been named CIFAR Azrieli Global Scholars.