Why do chemicals have to be heated in the flame first before the colored light is emitted?
Lance Cooper received a B.S. in Physics summa cum laude from the University of Virginia in 1982, and a Ph.D in Physics from the University of Illinois in 1988. After a two-year postdoctoral appointment at Bell Labs, Professor Cooper joined the UIUC faculty in 1990. From 1993-1995, he was a member of the Defense Science Study Group, which provides analysis for the DOD through the Institute for Defense Analysis. He was a Divisional Associate Editor for Physical Review Letters from 2006-2011.
Professor Cooper's group uses optical spectroscopy to reveal the properties of and excitations in novel states of matter in strongly correlated materials. His group has developed particular expertise in light-scattering experiments on materials under extreme conditions of low temperature, high pressure, and high magnetic field. The Cooper group's Raman spectroscopy experiments have shed light on the behavior of matter through various pressure- and magnetic-field-tuned quantum (T~0 K) phase transitions.
The Cooper group's first accomplishment with its "extreme conditions" optical spectroscopy capability was a study of the evolution of the crystal lattice ("phonon") and atomic spin dynamics through the pressure-tuned destruction of the insulating state of layered ruthenate materials. More recently, his group has studied how high pressures "melt" charge- and orbital-ordered insulating states, even at T=0 K, creating novel metallic phases. His group has also shown that magnetic fields can be used both to control the elastic properties of materials (e.g., "magnetic field induced shape memory") and to thwart long-range order down to T=0 K.Cooper's group has also recently developed the capability to grow high quality single crystals using floating zone, vapor transport, evaporative, and other methods. His group has successfully grown high quality single crystals of spinel materials such as Mn3O4, orbital ordering materials such as KCuF3, layered chalcogenide materials such as TiSe2, and topological insulators like Bi2Se3.
218 Seitz Materials Research Lab
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