Published January 22, 2003
| Version v1
Journal article
Quantum saturation of the order parameter and the dynamical soft mode in quartz
Creators
- 1. Departamento de Fisica de la Materia Condensada, Universidad de Sevilla, PO Box 1065, 41080 Sevilla (Spain)
- 2. Department of Earth Sciences, University of Cambridge, Downing Street, Cambridge (United Kingdom)
Description
The temperature evolution of the static order parameter of α-quartz and its soft-mode frequencies were determined at temperatures below 300 K. While these parameters follow classic Landau theory at higher temperatures, quantum saturation was found below room temperature with a characteristic quantum temperature of 187 K. A quantitative analysis gave a good agreement with the predictions of a Φ6 model close to the displacive limit and a rather flat dispersion of the soft-mode branch. No indication of any effect of strong mode-mode coupling on the saturation behaviour was observed
Availability note (English)
Available online at http://stacks.iop.org/0953-8984/15/315/c30231.pdf or at the Web site for the Journal of Physics. Condensed Matter (ISSN 1361-648X) http://www.iop.org/Additional details
Identifiers
- URL
- http://stacks.iop.org/0953-8984/15/315/c30231.pdf; http://www.iop.org/;
- PII
- S0953-8984(03)53624-4;
Publishing Information
- Journal Title
- Journal of Physics. Condensed Matter
- Journal Volume
- 15
- Journal Issue
- 2
- Journal Page Range
- p. 315-320
- ISSN
- 0953-8984
- CODEN
- JCOMEL
INIS
- Country of Publication
- United Kingdom
- Country of Input or Organization
- International Atomic Energy Agency (IAEA)
- INIS RN
- 34023089
- Subject category
- S75: CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY;
- Descriptors DEI
- COMPARATIVE EVALUATIONS; GINZBURG-LANDAU THEORY; ORDER PARAMETERS; QUANTUM MECHANICS; QUARTZ; TEMPERATURE DEPENDENCE
- Descriptors DEC
- EVALUATION; MECHANICS; MINERALS; OXIDE MINERALS