Observation of a novel high density 3O(2 × 2) structure on Ru(001)

K. L. Kostov; M. Gsell; P. Jakob; T. Moritz; W. Widdra; D. Menzel

doi:10.1016/S0039-6028(97)00787-5

Observation of a novel high density 3O(2 × 2) structure on Ru(001)

K. L. Kostov
, M. Gsell
, P. Jakob
, T. Moritz
, W. Widdra
, D. Menzel

Chair of Experimental Physics

Technical University of Munich
Institute of General and Inorganic Chemistry Bulgarian Academy of Sciences

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

89 Scopus citations

Abstract

High-resolution electron energy loss spectroscopy and scanning tunneling microscopy have been applied to identify and characterize a novel high density phase of oxygen adsorbed on Ru(001). Three oxygen atoms per (2 × 2) unit cell are arranged such that a (2 × 2) vacancy superstructure is formed. Atomically resolved STM images clearly establish the existence of such a phase. The ordered layer is characterized by a sharp (2 × 2) superstructure as seen by low energy electron diffraction. Two dipole active energy losses were found for the 3O(2 × 2) layer at 0.75 ML and interpreted as the in-phase oxygen to metal stretching vibration and the totally symmetric eigenmode consisting of frustrated translations of three next-neighbor oxygen atoms towards each other. The vibrational modes of this novel structure are compared to data for oxygen coverages in the range 0.5-1 ML.

Original language	English
Pages (from-to)	L138-L144
Journal	Surface Science
Volume	394
Issue number	1-3
DOIs	https://doi.org/10.1016/S0039-6028(97)00787-5
State	Published - 19 Dec 1997

Keywords

Chemisorption
Electron energy loss spectroscopy
Low index single crystal surface
Oxygen
Ruthenium
Scanning tunneling microscopy
Vibrations of adsorbed molecules

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10.1016/S0039-6028(97)00787-5

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title = "Observation of a novel high density 3O(2 × 2) structure on Ru(001)",

abstract = "High-resolution electron energy loss spectroscopy and scanning tunneling microscopy have been applied to identify and characterize a novel high density phase of oxygen adsorbed on Ru(001). Three oxygen atoms per (2 × 2) unit cell are arranged such that a (2 × 2) vacancy superstructure is formed. Atomically resolved STM images clearly establish the existence of such a phase. The ordered layer is characterized by a sharp (2 × 2) superstructure as seen by low energy electron diffraction. Two dipole active energy losses were found for the 3O(2 × 2) layer at 0.75 ML and interpreted as the in-phase oxygen to metal stretching vibration and the totally symmetric eigenmode consisting of frustrated translations of three next-neighbor oxygen atoms towards each other. The vibrational modes of this novel structure are compared to data for oxygen coverages in the range 0.5-1 ML.",

keywords = "Chemisorption, Electron energy loss spectroscopy, Low index single crystal surface, Oxygen, Ruthenium, Scanning tunneling microscopy, Vibrations of adsorbed molecules",

author = "Kostov, \{K. L.\} and M. Gsell and P. Jakob and T. Moritz and W. Widdra and D. Menzel",

note = "Funding Information: This work was supportedb y the Deutsche Forschungsgemeinschtharfot ughS FB 338.",

year = "1997",

month = dec,

day = "19",

doi = "10.1016/S0039-6028(97)00787-5",

language = "English",

volume = "394",

pages = "L138--L144",

journal = "Surface Science",

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TY - JOUR

T1 - Observation of a novel high density 3O(2 × 2) structure on Ru(001)

AU - Kostov, K. L.

AU - Gsell, M.

AU - Jakob, P.

AU - Moritz, T.

AU - Widdra, W.

AU - Menzel, D.

N1 - Funding Information: This work was supportedb y the Deutsche Forschungsgemeinschtharfot ughS FB 338.

PY - 1997/12/19

Y1 - 1997/12/19

N2 - High-resolution electron energy loss spectroscopy and scanning tunneling microscopy have been applied to identify and characterize a novel high density phase of oxygen adsorbed on Ru(001). Three oxygen atoms per (2 × 2) unit cell are arranged such that a (2 × 2) vacancy superstructure is formed. Atomically resolved STM images clearly establish the existence of such a phase. The ordered layer is characterized by a sharp (2 × 2) superstructure as seen by low energy electron diffraction. Two dipole active energy losses were found for the 3O(2 × 2) layer at 0.75 ML and interpreted as the in-phase oxygen to metal stretching vibration and the totally symmetric eigenmode consisting of frustrated translations of three next-neighbor oxygen atoms towards each other. The vibrational modes of this novel structure are compared to data for oxygen coverages in the range 0.5-1 ML.

AB - High-resolution electron energy loss spectroscopy and scanning tunneling microscopy have been applied to identify and characterize a novel high density phase of oxygen adsorbed on Ru(001). Three oxygen atoms per (2 × 2) unit cell are arranged such that a (2 × 2) vacancy superstructure is formed. Atomically resolved STM images clearly establish the existence of such a phase. The ordered layer is characterized by a sharp (2 × 2) superstructure as seen by low energy electron diffraction. Two dipole active energy losses were found for the 3O(2 × 2) layer at 0.75 ML and interpreted as the in-phase oxygen to metal stretching vibration and the totally symmetric eigenmode consisting of frustrated translations of three next-neighbor oxygen atoms towards each other. The vibrational modes of this novel structure are compared to data for oxygen coverages in the range 0.5-1 ML.

KW - Chemisorption

KW - Electron energy loss spectroscopy

KW - Low index single crystal surface

KW - Oxygen

KW - Ruthenium

KW - Scanning tunneling microscopy

KW - Vibrations of adsorbed molecules

UR - https://www.scopus.com/pages/publications/0031357237

U2 - 10.1016/S0039-6028(97)00787-5

DO - 10.1016/S0039-6028(97)00787-5

M3 - Article

AN - SCOPUS:0031357237

SN - 0039-6028

VL - 394

SP - L138-L144

JO - Surface Science

JF - Surface Science

IS - 1-3

ER -

Observation of a novel high density 3O(2 × 2) structure on Ru(001)

Abstract

Keywords

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