Lattice vibrations in <span class="aps-inline-formula"><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mrow><msub><mrow><mi mathvariant="normal">La</mi></mrow><mrow><mn>2</mn></mrow></msub></mrow></math></span><span class="aps-inline-formula"><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mrow><msub><mrow><mi mathvariant="normal">CuO</mi></mrow><mrow><mn>4</mn></mrow></msub></mrow></math></span>

Mark Mostoller; Jiquang Zhang; A. M. Rao; P. C. Eklund

doi:10.1103/PhysRevB.41.6488

Lattice vibrations in ${La}_{2}$ ${CuO}_{4}$

Mark Mostoller, Jiquang Zhang, A. M. Rao, and P. C. Eklund

Phys. Rev. B 41, 6488 – Published 1 April 1990

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.