Investigation of the Structural and Dynamical Properties of the (001) Surface of LiCu2O2
Yangyang Yao (1), Xuetao Zhu (1), H. C. Hsu (2), F. C. Chou (2), and, M. El-Batanouny (1), ((1) Physics Department, Boston University (2) Center of, Condensed Matter Sciences, National Taiwan University)
TL;DR
This study investigates the surface structure and vibrational properties of LiCu2O2's (001) surface using He scattering and lattice models, revealing a specific surface termination and low-lying phonon modes.
Contribution
It provides detailed experimental and theoretical insights into the surface termination and phonon dynamics of LiCu2O2's (001) surface, which was previously not well characterized.
Findings
Surface termination is a Li+1Cu+2O-2 plane.
Identification of two low-lying surface phonon modes.
Surface ions move normal to the surface.
Abstract
We report on studies of the structure and dynamics of the (001)surface of single crystal LiCu2O2, investigated by He beam scattering at room temperature, and with lattice dynamical models. The best fit surface corrugation to measured diffraction patterns shows that the surface termination is exclusively a Li+1Cu+2O-2 plane. Lattice dynamics fits to inelastic He scattering spectra reveal the presence of two low-lying surface phonon modes, identified with the motion of Cu+2, Li+1 surface ions normal to the surface.
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