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Polarization-dependent soft-x-ray absorption of highly oriented ZnO microrod arrays
被引:87
作者:
Guo, JH
[1
]
Vayssieres, L
Persson, C
Ahuja, R
Johansson, B
Nordgren, J
机构:
[1] Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA
[2] Uppsala Univ, Dept Phys, SE-75121 Uppsala, Sweden
[3] Univ Texas, Dept Mat Sci & Engn, Austin, TX 78712 USA
关键词:
D O I:
10.1088/0953-8984/14/28/308
中图分类号:
O469 [凝聚态物理学];
学科分类号:
070205 ;
摘要:
Polarization-dependent x-ray absorption measurements were performed on crystalline ZnO three-dimensional arrays consisting of highly oriented microrods as well as on particulate thin films consisting of monodisperse spherical nanoparticles. Strong anisotropic effects have been observed for the highly oriented ZnO rods, but not for the isotropic spherical nanoparticles. Full-potential calculations of the orbital-resolved x-ray absorption of a ZnO wurtzite periodic crystal, including Zn 3d among the valence states, show very good agreement with the experimental findings. Comprehensive fundamental knowledge of the electronic structure of ZnO is obtained by probing and demonstrating the orbital symmetry of oxygen and its contribution to the conduction band of this important II-VI semiconductor.
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页码:6969 / 6974
页数:6
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