Photoemission study of quantum confinement by a finite barrier: Cu/Co(wedge)/Cu(100)

Journal Article · Wed Mar 15 04:00:00 EST 1995 · Physical Review, B: Condensed Matter; (United States)

DOI:https://doi.org/10.1103/PhysRevB.51.7195· OSTI ID:6459284

Li, D; Pearson, J; Mattson, J E; Bader, S D ^[1]; Johnson, P D ^[2]

---

1. Materials Science Division, Argonne National Laboratory, Argonne, Illinois 60439 (United States)
2. Physics Department, Brookhaven National Laboratory, Upton, New York 11973 (United States)

Quantum confinement is studied with angle-resolved photoemission for ultrathin Cu separated from the Cu(100) substrate by an epitaxial wedge of Co (0--11 A) that serves as a finite barrier. For 2 ML of Cu, the photoemission intensities of the Cu [ital sp] quantum-well (QW) state at 1.6 eV binding energy and the corresponding [ital d]-band-derived QW state at 2.4 eV increase rapidly with the thickness of the Co barrier and indicate stronger confinement of the [ital d] QW state than of the [ital sp] state. Implications for the magnetic coupling and magnetoresistance are discussed.

• DOE Contract Number: W-31109-ENG-38; AC02-76CH00016
• OSTI ID: 6459284
• Journal Information: Physical Review, B: Condensed Matter; (United States), Journal Name: Physical Review, B: Condensed Matter; (United States) Vol. 51:11; ISSN PRBMDO; ISSN 0163-1829
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360104* -- Metals & Alloys-- Physical Properties
BINDING ENERGY
COBALT
COPPER
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
ELECTRONIC STRUCTURE
ELEMENTS
EMISSION
ENERGY
HYBRIDIZATION
MAGNETORESISTANCE
METALS
PHOTOEMISSION
PHYSICAL PROPERTIES
QUANTIZATION
SECONDARY EMISSION
TRANSITION ELEMENTS