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Dr. David L. Goodstein Frank J. Gilloon Distinguished Teaching and Service Professor and Professor of Physics and Applied Physics Primary
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| Expertise Phases and phase transitions in two and three dimensional matter, superfluidity, science education, scientific ethics. Field of Study Both basic and applied experimental research in a number of areas is carried out in collaboration with other members of Caltech's Condensed Matter Physics group. The phases and phase transitions of thin films of matter adsorbed on solid surfaces is a central concern. For example, much recent work has focused on methane, argon, and krypton films adsorbed on graphite. The objective here is to try to understand the relationship between the states of matter and dimensionality. Films of a single molecular layer and less may be regarded as essentially two-dimensional, while thicker films approach three-dimensional behavior. Experimental techniques include thermodynamic measurements using a highly automated, extremely sensitive scanning differential calorimeter built and programmed especially for this purpose. In a related series of experiments we have also studied the melting of matter capillary condensed in porous media. The experimental results for argon and krypton have led to a theoretical study, using the restricted solid-on-solid model, which has in turn accounted for some of the more surprising experimental results, and has also produced predictions of a rich variety of new phases and phase transitions that may take place in thin films and at solid interfaces. These predictions are expected to form the basis of future work. Selected Publications Materials Research Society. P. B. Weichman, P. Day and D. Goodstein, "Preroughening and Reentrant Layering Transitions on Triangular Lattice Substrates," Physical Review Letters 74, 418 (1995) D. Goodstein, P. Day, M.LaMadrid, and M. Lysek, "Phases and Phase Transitions in the First Few Layers of Methane, Argon and Krypton Adsorbed on Graphite," Mat. Res. Soc. Symp. Proc. Vol. 280, pg. 319, (1993) P. Day, M. Lysek, M. LaMadrid, P. B. Weichman and D. Goodstein, "Evidence for a preroughening transition and a disordered flat phase in solid argon and krypton," Physics B 194-196 (1994) 449-450. P. Day, M. LaMadrid, M. Lysek and D. Goodstein, "Multilayer krypton phase diagram," Physical Review B47, 7501 (1993) M. J. Lysek, M. A. LaMadrid, P. K. Day and D. L. Goodstein, "Heat capacity of multilayer methane on graphite: Phase transitions in the first four layers," Physical Review B47, 7389 (1993) |
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© 2007 California Institute of Technology. All Rights Reserved. last
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9 March, 2007
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