HARD MODE SPECTROSCOPY FOR THE INVESTIGATION OF STRUCTURAL AND SUPERCONDUCTING PHASE-TRANSITIONS

Authors
SALJE EKH YAGIL Y
Citation
Ekh. Salje et Y. Yagil, HARD MODE SPECTROSCOPY FOR THE INVESTIGATION OF STRUCTURAL AND SUPERCONDUCTING PHASE-TRANSITIONS, Journal of physics and chemistry of solids, 57(10), 1996, pp. 1413-1424
Citations number
61
Categorie Soggetti
Physics, Condensed Matter",Chemistry
Journal title
Journal of physics and chemistry of solids → ACNP
ISSN journal
00223697
Volume
57
Issue
10
Year of publication
1996
Pages
1413 - 1424
Database
ISI
SICI code
0022-3697(1996)57:10<1413:HMSFTI>2.0.ZU;2-9
Abstract
The temperature evolution of high frequency phonons and bound charge e xcitations is used to quantify the order parameter of phase transition s. The characteristic length of the vibrational excitations is in the order of the lattice repetition length, so that structural states are analysed on a local length scale. The effects of chemical mixing and s hort range order are demonstrated using ferroelastic Pb-3(PO4)(2) anti ferroelectric CaTiSiO5 and superconducting YBa2Cu3O7 as examples. The advantages and disadvantages of absorption measurements compared with reflection spectra are discussed.