Lattice vibrations inLa2CuO4

1 April 1990

journal article
Published by American Physical Society (APS) in Physical Review B

Vol. 41 (10) , 6488-6499
https://doi.org/10.1103/physrevb.41.6488

Abstract

The measured phonon frequencies in stoichiometric

{La}_{2}

{CuO}_{4}

have been critically examined and fitted with a simple shell model. The calculated results exhibit the soft mode that drives the tetragonal-to-orthorhombic structural phase transition, and provide some insight into the interatomic forces in this high-

T_{c}

material.

Keywords

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