Published September 2000 | Version v1
Journal article Metadata-only

Neutron scattering study of the normal-incommensurate phase transition in Rb2ZnBr4

Creators

  • 1. Nagoya Univ., Graduate School of Engineering, Department of Quantum Engineering, Nagoya (Japan)
  • 2. Yamaguchi Univ. (Japan). Faculty of Science
  • 3. Hokkaido Univ., Research Inst. for Electronic Science, Sapporo (Japan)
  • 4. Tsukuba Univ., Institute of Applied Physics, Tsukuba, Ibaraki (Japan)
  • 5. Tokyo Univ. (Japan). Inst. for Solid State Physics

Description

The soft phonon modes, which are related to the normal-incommensurate phase transition of Rb2ZnBr4, have been measured by inelastic neutron scattering. The existence of both phase and amplitude modes has been confirmed, and the phonon dispersion curves have been determined in the low-temperature commensurate phase. On the other hand, the phonon dispersion curve of the transverse acoustic phonon along the (0 0 ξ) direction does not vary appreciably in the normal phase. The soft mode is fully overdamped above the normal-incommensurate phase transition. Diffuse scattering develops around h0l ± 5/17 as temperature approaches Ti=347 K from above. (author)

Additional details

Publishing Information

Journal Title
Journal of the Physical Society of Japan
Journal Volume
69
Journal Issue
9
Journal Page Range
p. 2905-2909
ISSN
0031-9015

INIS

Country of Publication
Japan
Country of Input or Organization
Japan
INIS RN
32001023
Subject category
S75: CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY;
Descriptors DEI
BROMIDES; FERROELECTRIC MATERIALS; MONOCRYSTALS; NEUTRON DIFFRACTION; PHASE TRANSFORMATIONS; PHONONS; RUBIDIUM COMPOUNDS; SCATTERING; ZINC COMPOUNDS
Descriptors DEC
ALKALI METAL COMPOUNDS; BROMINE COMPOUNDS; COHERENT SCATTERING; CRYSTALS; DIELECTRIC MATERIALS; DIFFRACTION; HALIDES; HALOGEN COMPOUNDS; MATERIALS; QUASI PARTICLES; SCATTERING

Optional Information

Notes
34 refs., 7 figs.