Research News

Spin hall effect and origins of nonlocal resistance in adatom-decorated graphene

October 21, 2016 - In the recent Physical Review Letters article, Prof. Nikolic, visiting graduate student and Fullbright Scholar Juan Manuel Marmolejo-Tejada from Colombia and collaborators from France and Spain have performed detailed theoretical and computational analysis in order to resolve fierce controversy surrounding very recent experiments reporting an unexpectedly large spin Hall effect (SHE) in graphene decorated with adatoms.

Prof. Gizis discovers an "ultracool" brown dwarf that can generate flares stronger than the sun's

June 13, 2016 - Although astronomers often refer to brown dwarfs as “failed stars,” scientists at the University of Delaware have discovered that at least one of these dim celestial objects can emit powerful flashes of light. A research team led by Prof. Gizis, has discovered an “ultracool” brown dwarf known as 2MASS 0335+23, with a temperature of only 4400°F that can generate flares stronger than the sun’s. Gizis reported on the finding on June 13 at the annual meeting of the American Astronomical Society in San Diego.

Prof. Matthaeus helps explain characteristics of swirling solar wind

November 10, 2015 - Just a few hundred yards from the house where Italian astronomer Galileo Galilei (1564-1642) lived in Arcetri for the last nine years of his life, the University of Delaware's William Matthaeus is working to further the world's understanding of the heliosphere - the big bubble of magnetism that holds the solar system together - and especially its turbulent nature. Matthaeus, professor of physics and astronomy who specializes in heliospheric plasma physics and turbulence theory, is steering the Arcetri 2015 Workshop on Plasma Astrophysics this week.

Physics at the edge of the cut

October 14, 2015 - Perturbation theory (PT) is an essential tool for the mathematical modeling of physical systems. It allows one to approximate the solution of a complex problem in terms of the solution of a much simpler unperturbed one. PT can be used to find approximations to almost anything and it is used across fields in the physical and engineering sciences: the deflection of a wing and the magnetic moment of nuclei furnish examples from an endless list of possible applications.

Nano Letters article features new effect in the nascent field of topological spintronics

September 18, 2015 - In the recent Nano Letters article, an interdisciplinary team of physicists, materials scientists and electrical engineers, including Prof. Nikolic and DPA alumni Dr. Farzad Mahfouzi, have demonstrated novel effect in topological-insulator/ferromagnet (TI/FM) heterostructures exposed to microwave radiation.

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