Abstract
A non-inclusive sampling of recent advances in the application of physical acoustics to condensed matter physics is presented. Work by Ogi et al. on resonant ultrasound microscopy to map nano-scale variations in elastic moduli provides a new twist to the use of resonances. Laser-ultrasound studies by Wright and Matsuda on photoacoustic effects in ultra-thin metallic and semiconductor films leads to new meso-scale ultrasound studies, while Isaak and Ohno push the symmetry limits and temperature range of resonant ultrasound modulus studies. Migliori and Ledbetter extract the final pieces of an unusually-well-characterized charge-density-wave phase transition and examine very odd elastic behavior in materials with negative thermal expansion, while Pantea demonstrates an all-digital pulse echo system for high pressure work. Souslov probes hidden order with pulse-echo studies in pulsed magnetic fields. [Work supported by the National Science Foundation, the Department of Energy and the State of Florida.]
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