Anharmonicity on the Cu(110)-(2x1)O surface

Technical Report · Tue Jun 01 00:00:00 EDT 1993

OSTI ID:10184118

Duerr, H ^[1]; Baddorf, A P ^[2]

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1. Univ. of Pennsylvania, Philadelphia, PA (United States). Dept. of Physics
2. Oak Ridge National Lab., TN (United States). Solid State Div.

The authors have studied the temperature-dependent energy shift of surface vibrations on the Cu(110)-(2x1)O reconstructed surface using high-resolution electron energy loss spectroscopy. Interatomic bonds involved in the observed vibrations were extracted from phonon slab calculations. The measured energy shifts can be directly related to the anharmonicity of the potentials between the vibrating atoms by using a simple Morse oscillator model. By comparing to bulk phonon measurements, the authors find that both the oxygen-copper and copper-copper bonds at the surface have bulk-like anharmonicity. This is in contrast to the clean surface where strong anharmonicity is observed.

• Research Organization: Oak Ridge National Lab., TN (United States)
• Sponsoring Organization: USDOE, Washington, DC (United States); Alexander von Humboldt-Stiftung, Bonn (Germany)
• DOE Contract Number: AC05-84OR21400
• OSTI ID: 10184118
• Report Number(s): CONF-9306281-3; ON: DE94019120; TRN: AHC29423%%41
• Resource Relation: Conference: 7. vibrations at surfaces,Santa Margherita (Italy),13-17 Jun 1993; Other Information: PBD: Jun 1993
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
COPPER OXIDES
LATTICE VIBRATIONS
ANHARMONIC CRYSTALS
EXPERIMENTAL DATA
TEMPERATURE DEPENDENCE
AMPLITUDES
INTERATOMIC FORCES
360202
STRUCTURE AND PHASE STUDIES