Document type:
Zeitschriftenaufsatz
Author(s):
B̈oni, P.; Axe, J. D.; Shirane, G.; Birgeneau, R. J.; Gabbe, D. R.; Jenssen, H. P.; Kastner, M. A.; Peters, C. J.; Picone, P. J.; Thurston, T. R.
Title:
Lattice Instability and Soft Phonons in Single-Crystal ${\mathrm{La}}_{2\ensuremath{-}x}{\mathrm{Sr}}_{x}\mathrm{Cu}{\mathrm{O}}_{4}$
Abstract:
The dispersion of the low-lying phonon branches of several doped and undoped single crystals of La2-xSrxCuO4 has been investigated by using inelastic-neutron-scattering techniques. The zone-center modes are in reasonable agreement with Raman measurements. The reported peaks in the phonon density of states show up at energies that correspond to extrema in the dispersion curves of the transverse and longitudinal acoustic branches near the zone boundary. The tetragonal-to-orthorhombic phase transit...    »

Journal title:
Physical Review B
Year:
1988
Journal volume:
38
Month:
jul
Journal issue:
Pages contribution:
185
Fulltext / DOI: