Anharmonicity on the Cu(110)-(2×1)O surface

H. Dürr; A. P. Baddorf

doi:10.1016/0368-2048(93)80138-C

Anharmonicity on the Cu(110)-(2×1)O surface

H. Dürr, A. P. Baddorf

Scanning Tunneling Microscopy Group

Research output: Contribution to journal › Article › peer-review

7 Scopus citations

Abstract

We have studied the temperature-dependent energy shift of surface vibrations on the Cu(110)-(2×1)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, we 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.

Original language	English
Pages (from-to)	691-696
Number of pages	6
Journal	Journal of Electron Spectroscopy and Related Phenomena
Volume	64-65
Issue number	C
DOIs	https://doi.org/10.1016/0368-2048(93)80138-C
State	Published - Dec 12 1993

Funding

H. D. thanks the Alexander von Humboldt-Foundation for financial suppport. Research at ORNL was sponsored by the Division of Materials Sciences, U.S. Department of Energy under contract DE-AC05840R21400 with Martin Marietta Energy Systems, Inc.

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10.1016/0368-2048(93)80138-C

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abstract = "We have studied the temperature-dependent energy shift of surface vibrations on the Cu(110)-(2×1)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, we 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.",

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N2 - We have studied the temperature-dependent energy shift of surface vibrations on the Cu(110)-(2×1)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, we 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.

AB - We have studied the temperature-dependent energy shift of surface vibrations on the Cu(110)-(2×1)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, we 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.

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Anharmonicity on the Cu(110)-(2×1)O surface

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