STM Studies of NaCl Thin Films on Cu(111) Surface at Low Temperature

Abstract

NaCl thin films on Cu(111) surfaces have been studied by scanning tunneling microscopy at 78 K. Standing wave patterns appeared not only on the Cu(111) but also on the NaCl films. The wave vector of the standing waves on the NaCl films was shorter than that on the Cu(111), indicating that the energy dispersion of the interface states on the NaCl films shifted upward from that of the Cu(111).

Keywords:

• low temperature scanning tunneling microscopy
• standing wave patterns
• surface states