Subsurface excitations in a metal

M. P. Ray, R. E. Lake, C. E. Sosolik, Lasse Bjørchmar Thomsen, Gunver Nielsen, Ib Chorkendorff, Ole Hansen

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Abstract

We investigate internal hot carrier excitations in a Au thin film bombarded by hyperthermal and low energy alkali and noble gas ions. Excitations within the thin film of a metal-oxide-semiconductor device are measured revealing that ions whose velocities fall below the classical threshold given by the free-electron model of a metal still excite hot carriers. Excellent agreement between these results and a nonadiabatic model that accounts for the time-varying ion-surface interaction indicates that the measured excitations are due to semilocalized electrons near the metal surface.
Original languageEnglish
JournalPhysical Review B Condensed Matter
Volume80
Issue number16
Pages (from-to)161405
ISSN0163-1829
DOIs
Publication statusPublished - 2009

Bibliographical note

Copyright 2009 American Physical Society

Keywords

  • ION-BEAMS
  • CLEAN POLYCRYSTALLINE GOLD
  • SOLIDS
  • ENERGY
  • SURFACES
  • KINETIC ELECTRON-EMISSION

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