Seeing the Fermi Surface in Real Space by Nanoscale Electron Focusing
| Autor: | Peter Zahn, Samir Lounis, Rainer G. Ulbrich, Peter H. Dederichs, Norbert Quaas, Martin Wenderoth, Stefan Blügel, Alexander Weismann |
|---|---|
| Rok vydání: | 2009 |
| Předmět: |
Surface (mathematics)
Multidisciplinary Condensed matter physics Chemistry Fermi level Quantum oscillations Fermi surface 02 engineering and technology Electron 021001 nanoscience & nanotechnology 01 natural sciences law.invention symbols.namesake law 0103 physical sciences symbols Scanning tunneling microscope 010306 general physics 0210 nano-technology Electronic band structure Fermi Gamma-ray Space Telescope |
| Zdroj: | Science. 323:1190-1193 |
| ISSN: | 1095-9203 0036-8075 |
| DOI: | 10.1126/science.1168738 |
| Popis: | The Fermi surface that characterizes the electronic band structure of crystalline solids can be difficult to image experimentally in a way that reveals local variations. We show that Fermi surfaces can be imaged in real space with a low-temperature scanning tunneling microscope when subsurface point scatterers are present: in this case, cobalt impurities under a copper surface. Even the very simple Fermi surface of copper causes strongly anisotropic propagation characteristics of bulk electrons that are confined in beamlike paths on the nanoscale. The induced charge density oscillations on the nearby surface can be used for mapping buried defects and interfaces and some of their properties. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|