# # arev:/usr/local/unicat/unireq/beamreq/req00016.txt # UNICAT Member Beam Time Request #16 # created Wed Apr 15 09:06:42 CDT 1998 # days: 6 description: Transmission diffraction/scattering experiments will be carried out to study phase transitions in high temperature superconductors and charge density wave compounds. Specifically, we will measure diffuse scattering patterns from the 2212 compound with a transition temperature of ~80 K. Electron phonon coupling in such material may give rise to modified phonon properties in certain regions in k space (near the electronic Fermi level and exhibiting d-wave symmetry). Similar experiments will be carried out for several layered charge density wave compounds. equipment+required: Displex. experiment: Transmission diffraction/scattering from superconductors and charge density wave compounds hazards: All samples are in the solid form, and are stable in air. Do not ingest. name: Tai C. Chiang nonmembers: station: 33ID-D unacceptable+dates: #QUERY_STRING: #REMOTE_HOST: chiang.mrl.uiuc.edu #REMOTE_ADDR: 128.174.102.98 #CONTENT_LENGTH: 869 #HTTP_REFERER: http://www.uni.aps.anl.gov/unireq.htm #HTTP_USER_AGENT: Mozilla/4.01 [en] (Win95; I)