Polarity effects on ZnO films grown along the nonpolar [1120] direction |
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Authors: | Zúñiga-Pérez Jesús Muñoz-Sanjosé Vicente Palacios-Lidón Elisa Colchero Jaime |
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Affiliation: | Departament Física Aplicada i Electromagnetisme, Universitat de València, C/Dr. Moliner 50, 46100 Burjassot, Spain. |
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Abstract: | The surface electrical properties of ZnO thin films grown along the nonpolar [1120] direction have been investigated by Kelvin probe microscopy on a nanometer scale. Two different charge domains, with a 75 meV work function difference, coexist within the ZnO surface, which is covered by rhombohedral pyramids whose sidewalls are shown to be {1011}-type planes. The presence and relative orientation of the two kinds of charge domains are explained in terms of the atomic arrangement at the {1011} polar surfaces. |
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