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首页> 外文期刊>Physica, C. Superconductivity and its applications >NANO-SCALE ELECTRON ENERGY-LOSS SPECTROSCOPY OF THE OXYGEN K EDGE IN BI2SR2CA1CU2O8+DELTA
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NANO-SCALE ELECTRON ENERGY-LOSS SPECTROSCOPY OF THE OXYGEN K EDGE IN BI2SR2CA1CU2O8+DELTA

机译：BI2SR2CA1CU2O8 + DELTA中氧K边缘的纳米尺度电子能谱

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摘要

We demonstrate, for the first time, that even in highly anisotropic, quasi-two-dimensional Bi2Sr2Ca1Cu2O8+delta, electron energy-loss spectroscopy (EELS) performed in a transmission electron microscope (TEM) is a very valuable technique for understanding local changes in the oxygen-hole density on a nanometer scale. After optimizing both the scattering angle of the incident beam and the collection angle of the spectrometer for a particular crystal orientation, a TEM-EELS experiment is capable of documenting local (similar to several nm) variations in strength of the pre-peak of oxygen absorption K edge spectrum. This investigation reveals the hole-concentration profile across grain boundaries, and hence, furthers understanding of the superconducting behavior of the grain boundary in this technologically important material. [References: 29]
机译：我们首次证明，即使在高度各向异性的准二维Bi2Sr2Ca1Cu2O8 + delta中，在透射电子显微镜（TEM）中进行的电子能量损失谱（EELS）也是了解局部变化的非常有价值的技术。纳米级的氧孔密度。在针对特定的晶体取向优化入射光束的散射角和光谱仪的收集角后，TEM-EELS实验能够记录氧气吸收峰前强度的局部（类似于几纳米）变化K边缘谱。这项研究揭示了跨晶界的空穴浓度分布，因此，进一步了解了这种技术上重要的材料中晶界的超导行为。 [参考：29]

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