Quantized hole states detected by photoemission in ultrathin epitaxial CoSi2films on Si(111)
- 15 January 1989
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review B
- Vol. 39 (2) , 1422-1425
- https://doi.org/10.1103/physrevb.39.1422
Abstract
Angle-resolved photoemission spectra from ultrathin (≤20 Å) epitaxial Co films on Si(111) reveal narrow features with binding energies in the 0-0.6 eV energy window that depend drastically on film thickness. These peaks reflect quantized hole states arising from particle confinement to a narrow potential well in the direction normal to the surface. Evidence is also presented for significant changes in the Co crystal potential at very small film thicknesses.
Keywords
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