Impurity atoms on view in cuprates

被引：0
|
作者：
Davis, J.C. Séamus [1 ]
机构：
[1] Department of Physics, University of California, Berkeley, CA 94720, United States
来源：
Materials Today | 2002年 / 5卷 / 04期
基金：
美国国家科学基金会;
关键词：
Approximation theory - Atoms - Copper - Copper compounds - Electron gas - Impurities - Parameter estimation - Quantum theory - Scanning tunneling microscopy - Superconductivity - Zinc;
D O I：
10.1016/S1369-7021(02)05422-6
中图分类号：
学科分类号：
摘要：
The atomic-scale effects of individual Ni and Zn impurity atoms on the cuprate high critical temperature superconductors are analyzed using scanning t unnelling microscopy (STM). The low temperature STM can simultaneously image the surface topography and measure the local density of electronic states (LDOS). The atoms are displaced from their ideal orthrohombic lattice sites, forming a three-dimensional (3D) supermodulation9 of wavelength∼26 A along the b-axis. It is found that a single impurity atom, substituted for Cu in the CuO2 plane, disrupts the electronic environment and the electronic correlations between electrons on neighbouring Cu atoms.
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页码：24 / 33
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