Negative electron affinity at the Cs/AIN(0001) surface

C. I. Wu, A. Kahn

Research output: Contribution to journalArticlepeer-review

27 Scopus citations


The effects of cesium (Cs) adsorption on band bending and electron affinity at the AIN(0001)-1 × 1 surface are investigated via ultraviolet and x-ray photoemission spectroscopy. The movement of the Fermi level indicates an initial interaction between Cs and empty surface states, followed by an increase in band bending presumably linked to metallization. The electron affinity, χ, of the clean AIN surface is positive and equal to 1.9±0.3 eV. The Cs-surface dipole layer decreases χ by 2.6±0.3 eV, leading to evidence of true negative electron affinity at the surface of this important material.

Original languageEnglish (US)
Pages (from-to)1433-1435
Number of pages3
JournalApplied Physics Letters
Issue number10
StatePublished - Mar 8 1999

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy (miscellaneous)


Dive into the research topics of 'Negative electron affinity at the Cs/AIN(0001) surface'. Together they form a unique fingerprint.

Cite this