Investigation of the structural and dynamical properties of the (0 0 1) surface of LiCu2O2 |
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| Authors: | Yangyang Yao Xuetao Zhu HC Hsu FC Chou M El-Batanouny |
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| Institution: | 1. Physics Department, Boston University, Boston, MA 02215, United States;2. Center of Condensed Matter Sciences, National Taiwan University, Taipei 10617, Taiwan |
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| Abstract: | We report on studies of the structure and dynamics of the (0 0 1) 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 Li1+Cu2+O2? plane. Lattice dynamics fits to inelastic He scattering spectra reveal the presence of two low-lying surface phonon modes, identified with the motion of Cu2+, Li1+ surface ions normal to the surface. |
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