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LASSP -  Laboratory of Atomic and Solid State Physics

Cornell Laboratory for Atomic and Solid State Physics

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Andreas Hermann and Neil Ashcroft theorize properties of astatine

Andreas Hermann and Neil Ashcroft along with Roald Hoffmann from chemistry have developed a theory describing the properties of astatine. This radioactive rare element has remained a mystery since its synthesis in 1940. Read more in the Chronicle. View full article at Physical Review Letters.

Astatine ground-state Cmca structure

Tomas Arias part of "Flipped Classroom" project

Prof Tomas Arias is part of a pilot project that flips the typical lecture/homework classroom. Instead of lecturing to learn content material in class and applying it in homework, a flipped classroom uses homework to learn the content and class time is focused on applications and problem solving.

More about the flipped classroom initiative is in the Chronicle

Memorial service for Robert Richardson held July 13

A memorial service for physicist Robert Richardson was held July 13 in Sage Chapel. Remembrances from the service are in the Chronicle.

A Nobel laureate and one of Cornell’s most influential administrators, Richardson died Feb. 19 in Ithaca. He served as Cornell's first vice provost for research from 1998 to 2007 and was named senior vice provost for research emeritus in 2008.

Robert Richardson

Séamus Davis Images Electron Pairing in a Simple Magnetic Superconductor

In the search for understanding how some magnetic materials can be transformed to carry electric current with no energy loss, scientists at the U.S. Department of Energy's Brookhaven National Laboratory, Cornell University, and collaborators have made an important advance: Using an experimental technique they developed to measure the energy required for electrons to pair up and how that energy varies with direction, they've identified the factors needed for magnetically mediated superconductivity—as well as those that aren't.

"Our measurements distinguish energy levels as small as one ten-thousandth the energy of a single photon of light—an unprecedented level of precision for electronic matter visualization," said Séamus Davis, Senior Physicist at Brookhaven the J.G. White Distinguished Professor of Physical Sciences at Cornell, who led the research described in Nature Physics. "This precision was essential to writing down the mathematical equations of a theory that should help us discover the mechanism of magnetic superconductivity, and make it possible to search for or design materials for zero-loss energy applications."

Read more from from Brookhaven National Laboratory.

superconducting electron pairs

Eun-Ah Kim and Paul McEuen discover 'electrical highways' in graphene

LASSP faculty Eun-Ah Kim and Paul McEuen are taking two approaches to understanding bilayer graphene and its potential as a semiconductor. Prof McEuen leads an experimental group that revealed the presence of structural solitons in bilayer graphene. Prof Kim's group predicted that these solitons will act as ‘electrical highways’ allowing electrons to shoot from one end of the graphene sheet to the other.

Read more in the Chronicle.

Three dark field-transmission electron microscopy images of bilayer graphene are overlaid with colors to show diffraction angles.

Kathryn McGill attends training on communicating science

Grad students Kathryn McGill of LASSP, and Flip Tanedo of LEPP attended training on communicating science in June. The Communicating Science Conference (ComSciCon) showcases efforts to make current advances in science accessible to the public. McGill has developed her interest in scientific outreach into her YouTube channel: The Physics Factor.

Read more in the Chronicle.