Lattice-dynamical properties of black phosphorus under pressure studied by inelastic neutron scattering

Journal Article · Sat Sep 01 00:00:00 EDT 1984 · Phys. Rev. B: Condens. Matter; (United States)

DOI:https://doi.org/10.1103/PhysRevB.30.2410· OSTI ID:6362575

Yamada, Y; Fujii, Y; Akahama, Y; Endo, S; Narita, S; Axe, J D; McWhan, D B

Acoustic-phonon dispersion relations of black phosphorus in its orthorhombic A11 phase have been measured along three principal directions mainly at 1 bar and 15.4 kbar. An anomalous softening has been observed on the LA(100) branch whose vibrational patterns (eigenvectors) have been analyzed based on a force-constant-model fit by Kaneta et al. It is suggested that this softening is caused through electron-phonon interactions associated with a large change in bonding angles. The TA/sub y/(001) mode at the zone boundary, which can be assigned to the atomic displacements relevant to the A11-to-A7 (rhombohedral) structural transition at 45 kbar, does not soften, but at least the hardening shows a tendency to saturate at pressure higher than 15.4 kbar.

• Research Organization: Faculty of Engineering Science, Osaka University Toyonaka, Osaka 560, Japan
• OSTI ID: 6362575
• Journal Information: Phys. Rev. B: Condens. Matter; (United States), Vol. 30:5
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
PHOSPHORUS
CRYSTAL-PHASE TRANSFORMATIONS
LATTICE VIBRATIONS
NEUTRON DIFFRACTION
DISPERSION RELATIONS
ELECTRON-PHONON COUPLING
EXPERIMENTAL DATA
INELASTIC SCATTERING
MONOCRYSTALS
ORTHORHOMBIC LATTICES
PHONONS
PRESSURE DEPENDENCE
VERY HIGH PRESSURE
COHERENT SCATTERING
CRYSTAL LATTICES
CRYSTAL STRUCTURE
CRYSTALS
DATA
DIFFRACTION
ELEMENTS
INFORMATION
NONMETALS
NUMERICAL DATA
PHASE TRANSFORMATIONS
QUASI PARTICLES
SCATTERING
360603* - Materials- Properties