Varela M, Findlay S D, Lupini A R, Christen H M, Borisevich A Y, Dellby N, Krivanek O L, Nellist P D, Oxley M P, Allen L J, Pennycook S J
Condensed Matter Sciences Division, Oak Ridge National Laboratory, P.O. Box 2008, Oak Ridge, Tennessee 37831-6030, USA.
Phys Rev Lett. 2004 Mar 5;92(9):095502. doi: 10.1103/PhysRevLett.92.095502. Epub 2004 Mar 3.
The ability to localize, identify, and measure the electronic environment of individual atoms will provide fundamental insights into many issues in materials science, physics, and nanotechnology. We demonstrate, using an aberration-corrected scanning transmission electron microscope, the spectroscopic imaging of single La atoms inside CaTiO3. Dynamical simulations confirm that the spectroscopic information is spatially confined around the scattering atom. Furthermore, we show how the depth of the atom within the crystal may be estimated.
对单个原子的电子环境进行定位、识别和测量的能力，将为材料科学、物理学和纳米技术中的许多问题提供基本见解。我们使用像差校正扫描透射电子显微镜，展示了CaTiO₃ 内部单个镧原子的光谱成像。动力学模拟证实，光谱信息在空间上局限于散射原子周围。此外，我们展示了如何估计晶体中原子的深度。
