P. B. Allen Research Group Photos

Students Yiing-Rei Chen, Vasili Perebeinos, Branislav Nikolic, and Ilka Bischofs, taken in July 2000 on the occasion of Branislav successfully defending his thesis.  A few weeks later, Branislav moved to Washington DC to take a post-doc position in the group of Jim Freericks at Georgetown University.
The committee which examined Branislav's thesis.  From left to right, Myron Strongin (BNL), P. B. Allen, Dr. Branislav K. Nikolic, Gerry Brown, and Vladimir Goldman (holding a glass of champagne.)  One part of Branislav's thesis was a theoretical analysis of an experiment of Myron Strongin's on the optical properties of thin films of lead.  That research was published in a joint paper in Phys. Rev. Letters, fall 1999.  Other parts of Branislav's thesis deal with currents in mesoscopic metals, and the crossover between Boltzmann transport and strong Anderson localization.
Christopher Yee-Chan (left) and Philip Miu (right) are students at The Wheatley School (public high school of Old Westbury, NY.)  During the summer of 2000 they worked  with me on the problem of whether vibrations in an anharmonic linear chain can equilibrate.  This famous problem was first investigated by Fermi, Pasta, and Ulam.  The issue of equilibration may or may not have been solved in the intervening 45 years, but even if it has, it still provokes heated debate.  We think we might be able to improve the understanding by studying how pulses evolve toward equilibrium.  The pulses are initially nearly monochromatic traveling waves.
The committee which examined Vasili Perebeinos's thesis, March 11, 2001.  From the left: Jim Davenport, PBA, Vasili, Jack Smith, and Peter Stephens.  On April 1, 2001, Vasili became post-doc at Brookhaven National Lab, working with Mike Weinert.  Vasili's thesis was about self-trapped states in crystalline solids.  Perhaps the simplest and neatest result is the picture of the lowest electronic excitation of LaMnO3 as a self-trapped (orbital) exciton (or "orbiton").

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