The use of MIM tunnel junctions to investigate kinetic electron excitation in atomic collision cascades.

In: Nuclear Instruments & Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms (Nucl Instrum Methods Phys Res Sect B), Jg. 230 (2005), S. 608-612
ISSN: 0168-583X
Zeitschriftenaufsatz / Fach: Chemie
Abstract:
A novel technique is introduced to investigate the kinetic excitation of electrons in a solid by bombardment with energetic ions. The sample is prepd. as a metal-insulator-metal (MIM) tunnel junction which opens the possibility to detect hot electrons with excitation energies well below the vacuum barrier. The excitations produced by the projectile impact onto the top electrode are detected as a tunnel current into the underlying base electrode. By varying the top electrode thickness, the elastic transport of hot electrons towards the tunnel junction can be studied.