Exploring Phonon Signals by High Energy / High Spatial Resolution EELS
نویسندگان
چکیده
1 Nion Co., 1102 Eight St, Kirkland, WA 98033, USA 2 Center for Solid State Science, Arizona State University, Tempe, AZ 85287, USA 3 Department of Chemistry and Biochemistry, Arizona State University, Tempe, AZ 85287, USA 4 School for Engineering of Matter, Transport and Energy, ASU, Tempe, AZ 85287, USA 5 Department of Physics, ASU, Tempe, AZ 85287, USA 6 Department of Physics, University of Alberta, Edmonton T6G 2E1, Canada 7 IAMDN, Department of Physics, Rutgers University, Piscataway, NJ 08854, USA
منابع مشابه
Energy-Filtered High-Angle Dark Field Mapping of Ultra-Light Elements
Using the High Energy Resolution Monochromated EELS-STEM (HERMES) system we recently introduced [1] together with Gatan’s Enfinium spectrometer with upgraded ultra-high stability power supplies [2], energy resolution as low as 14 meV has been demonstrated in electron energy loss spectra (EELS) acquired in 0.1 s (Fig. 1), and sub-20 meV resolution has become typical for routine acquisitions of s...
متن کاملAtomic resolution mapping of phonon excitations in STEM-EELS experiments.
Atomically resolved electron energy-loss spectroscopy experiments are commonplace in modern aberration-corrected transmission electron microscopes. Energy resolution has also been increasing steadily with the continuous improvement of electron monochromators. Electronic excitations however are known to be delocalized due to the long range interaction of the charged accelerated electrons with th...
متن کاملSingle atomic layer detection of Ca and defect characterization of Bi-2212 with EELS in HA-ADF STEM.
By forming a small electron probe in a scanning transmission electron microscope equipped with a high-angle annular dark-field (HA-ADF) detector, the Bi-O atomic planes in Bi2Sr2CaCu2O(8+delta) (Bi-2212) can be directly observed with the incoherent Z-contrast imaging technique. Using a combination of electron energy loss spectroscopy (EELS) and HA-ADF imaging, we were able to detect the Ca sign...
متن کاملEvaluation of the performance of parallel-hole collimator for high resolution small animal SPECT: A Monte Carlo study
Introduction: Image quality and accuracy of in vivo activity quantification in SPECT are affected by collimator penetration and scatter components, especially in high energy imaging. These phenomena highly depend on the collimator characteristic and photon energy. The presence of penetrated and scattered photons from collimator in SPECT images degrades spatial resolution, contr...
متن کاملMapping Magnetic Ordering With Aberrated Electron Probes in STEM
Although magnetism originates at the atomic scale, existing spectroscopic techniques sensitive to magnetic signals only produce spectra with spatial resolutions on a larger scale. However, recently it has been theoretically argued that atomic-size electron probes with customized phase distributions can detect electron magnetic circular dichroism (EMCD) [1]. Based on this prediction we have rece...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
دوره شماره
صفحات -
تاریخ انتشار 2014