Abstract
Scanning tunneling microscopy and spectroscopy are employed in studies of ZnO single crystals. In particular we focus on spatially resolved tunneling spectroscopy of electron accumulation layers, produced by low-energy implantation of hydrogen ions on the oxygen (0001¯) face. These layers constitute a quantized two-dimensional electron gas system on the free surface. The tunneling current-voltage (Formula presented) and (Formula presented) vs (Formula presented) curves acquired after implantation show structures which reflect the energy minima of the two-dimensional electronic subbands and localized surface states.
| Original language | English |
|---|---|
| Pages (from-to) | 6274-6277 |
| Number of pages | 4 |
| Journal | Physical Review B - Condensed Matter and Materials Physics |
| Volume | 57 |
| Issue number | 11 |
| DOIs | |
| State | Published - 1998 |