Mapping the Local Density of States by Very-Low-Energy Scanning Electron Microscope

0340743 - ÚPT 2010 RIV JP eng J - Journal Article
Pokorná, Zuzana - Frank, Luděk
Mapping the Local Density of States by Very-Low-Energy Scanning Electron Microscope.
Materials Transactions. Roč. 51, č. 2 (2010), s. 214-218. ISSN 1345-9678. E-ISSN 1347-5320
Institutional research plan: CEZ:AV0Z20650511
Keywords : density of states * scanning low energy electron microscopy * aluminum * very-low-energy scanning electron microscopy * electron band structure
Subject RIV: JA - Electronics ; Optoelectronics, Electrical Engineering
Impact factor: 0.779, year: 2010
http://www.jim.or.jp/journal/e/51/02/214.html

Reflection of very slow electrons from solid surfaces has been reported to be inversely proportional to the local density of electronic states coupled to the incident electron wave. The reflected electron flux at units of eV used as the image signal in a scanning electron microscope allows mapping of the local density of states at high spatial resolution. Good performance of the microscope at very low energies is enabled by introducing the beam-retarding immersion lens (the cathode lens) with a biased specimen serving as the cathode. Results of demonstration experiments on aluminum are provided.
Permanent Link: http://hdl.handle.net/11104/0183925