Phys. Rev. Lett. 78, 1327–1330 (1997)Depopulation of the Ag(111) Surface State Assigned to Strain in Epitaxial FilmsReceived 7 October 1996; published in the issue dated 17 February 1997 Photoemission spectra from epitaxial Ag(111) films on Si(111)-( 7×7) show that the γ̅ surface state in Ag(111) is depopulated in films deposited on the silicon surface when compared with ideal Ag(111) surfaces. This is interpreted as a shift of the surface state up in energy, beyond the Fermi level, since it can be partly reversed by a lowering of the work function, in accordance with phase-accumulation model calculations. This shift is ascribed, through band structure calculations, to the strain in the Ag layers induced by film growth. © 1997 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.78.1327
DOI:
10.1103/PhysRevLett.78.1327
PACS:
73.20.At, 61.72.Hh, 79.60.-i
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