Seeing the Fermi Surface in Real Space by Nanoscale Electron Focusing

• DOI: 10.1126/science.1168738
• Publication Date: 2009-02-26T22:27:38Z
• Authors: Alexander Weismann; Martin Wenderoth; Samir Lounis; Peter Zahn; Norbert Quaas; Rainer G. Ulbrich; Peter H. Dederichs; Stefan Blügel
• Keywords: 0103 physical sciences; 01 natural sciences

The Fermi surface that characterizes the electronic band structure of crystalline solids can be difficult to image experimentally in a way reveals local variations. We show surfaces imaged real space with low-temperature scanning tunneling microscope when subsurface point scatterers are present: this case, cobalt impurities under copper surface. Even very simple causes strongly anisotropic propagation characteristics bulk electrons confined beamlike paths on nanoscale. induced charge density oscillations nearby used for mapping buried defects and interfaces some their properties.