Electronic structure investigation of Cu(110), Ag(110) and Ni(110) surfaces covered with chemisorbed oxygen up to half a monolayer

Courths, R.; Hüfner, S.; Kemkes, P.; Wiesen, G.

doi:10.1016/s0039-6028(96)01322-2

Cited by 45 publications

(39 citation statements)

References 49 publications

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“…10. Note that the results of experimental studies 14,35 show a quite weak oxygen-induced feature in this energy range.…”

Section: Electronic Structurementioning

confidence: 76%

“…We believe that the mechanism responsible for this behavior could be related to the arrangement of O adatoms to form O-Ag-O chains at the upper side of the (110) steps. Indeed, the A-A adsorption configuration is similar to that occurring in the reconstruction of the Ag(110) surface upon oxygen adsorption, in which O atoms align in added-rows along the [001] direction, thus forming stable O-Ag-O structures 14,15 (the Ag(110)p(2×1)O surface is shown in Fig. 3).…”

Section: The Stability Of O-ag-o Rowsmentioning

confidence: 87%

“…13 It was thus proposed to assign the low energy peak to adatoms occupying (100) terrace sites and the one at higher energy to atomic oxygen adsorbed at the step edges forming O-Ag-O chains similar to the added rows found in reconstructed O/Ag(110) surfaces. 14,15 In O/Ag(210) an additional peak around 56 meV was found, and it was proposed that it is due to the vibration of an oxygen atom occupying a subsurface site.…”

Section: Introductionmentioning

confidence: 99%

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Structure and dynamics of oxygen adsorbed on Ag(100) vicinal surfaces

et al. 2004

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The structure and dynamics of atomic oxygen adsorbed on Ag(410) and Ag(210) surfaces has been investigated using density functional theory. Our results show that the adsorption configuration in which O adatoms decorate the upper side of the (110) steps forming O-Ag-O rows is particularly stable for both surfaces. On Ag(210), this arrangement is more stable than other configurations at all the investigated coverages. On Ag(410), adsorption on the terrace and at the step edge are almost degenerate, the former being slightly preferred at low coverage while the latter is stabilized by increasing the coverage. These findings are substantiated by a comparison between the vibrational modes, calculated within density-functional perturbation theory, and the HREEL spectrum which has been recently measured in these systems.

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“…10. Note that the results of experimental studies 14,35 show a quite weak oxygen-induced feature in this energy range.…”

Section: Electronic Structurementioning

confidence: 76%

Section: The Stability Of O-ag-o Rowsmentioning

confidence: 87%

Section: Introductionmentioning

confidence: 99%

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Structure and dynamics of oxygen adsorbed on Ag(100) vicinal surfaces

et al. 2004

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“…The properties of such a system have been studied by a variety of theoretical [2][3][4][5][6][7] and experimental methods [6][7][8][9][10][11][12]. Ab-initio calculations [2][3][4] have largely contributed to the understanding of many of these properties.…”

Section: Introductionmentioning

confidence: 99%

Electronic structure of the Cu-p(2×1)O surface by the semi-empirical LCAO method

Cortona

Sapet

2004

Surface Science

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“…1 15 (black empty circles), the broad satellite (p z on O) delimited from above by violet and from below by blue parabolas, experimentally detectable as a broad feature at ≈-0.2 eV 16 (blue empty circle), and two strong antibonding surface states S x (p x )/S z (p z ) strongly localized on the oxygen atoms at ≈-0.6/-0.8 eV clearly detectable experimentally. 16 The lower border of the projected bulk band gap is shown by black dashed line, the upper border, not shown, is around 4 eV above it. Right panel: Large-scale topographic image showing Co atoms deposited on the p(2 × 1) terrace.…”

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confidence: 99%

Promoting Atoms into Delocalized Long-Living Magnetically Modified State Using Atomic Force Microscopy

et al. 2016

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We report on a low-temperature AFM manipulation of Co atoms in UHV on an oxidized copper surface in which the manipulated atom is kept delocalized above several surface unit cells over macroscopic times. The manipulation employed, in addition to the ubiquitous shortrange tip-generated chemical forces, also longrange forces generated via Friedel oscillations of the metal charge density due to Co nanostructures prearranged on the surface by lateral manipulation. We show that our manipulation protocol requires mechanical control of the spin state of the Co atom.Keywords: AFM manipulation, magnetic atoms, mechanical control of spin, Friedel oscillations.Scanning probe microscopies (SPM), such as scanning tunneling microscopy (STM) and noncontact atomic force microscopy (NC-AFM), have played a key role in constructing nanostructures with atomic dimensions. STM and NC-AFM have a number of unique abilities such as scanning surfaces with atomic resolution, 1 providing information on the chemical identity of the scanned atoms, 2 and perhaps the most fascinating ability of performing nano-manipulations.3-5 Both lateral 6,7 and vertical 8-10 atomic manipulations have been performed to build bottom-up nanostructures on surfaces either by moving the manipulated atoms directly 6,11 or by exchanging pairs of atoms.9,12 All these manipulations have been performed with non-magnetic atoms on high-symmetry (111) and (001) substrates and have strongly relied on short-range site-specific chemical interactions. 4 Here we show that by harnessing both short-(≤5Å) and long-range (≈ 5 -40Å) interactions exerted on magnetic atoms, novel manipulation protocols can be designed whereby in a controlled way the manipulated atoms can be kept in a magnetically modified state which is imaged over macroscopic times as delocalized above several surface unit cells.Friedel oscillations 13,14 of metal surface charge density due to adatoms or adatom superstructures adsorbed on it may provide a natural mechanism of long-range interaction forces exerted on an adatom which is manipulated by an SPM tip. However, combining these rather weak (in the range of meV 13,14 ) interactions with the short range chemical interaction of the adatom with the substrate (and possibly the tip) is challenging as the latter interaction is rather strong (typically in the eV range). Existence of strong short-range 1 forces is essential in trapping the adatoms in the desired positions when building nanostructures, as otherwise they would be undesirably highly mobile at finite temperatures and be easily moved by the tip. However, as will be demonstrated here, if the short-range interaction provides a highly corrugated potential energy surface (PES), which contains smooth plateaus separated by deep minima, then the long-range interaction due to the surrounding adatoms provided by the Friedel oscillations, may have profound implications on the manipulated adatom.One example of such a system with the required form of the PES is a cobalt adatom adsorbed on the p(2 × 1) phase...

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Electronic structure investigation of Cu(110), Ag(110) and Ni(110) surfaces covered with chemisorbed oxygen up to half a monolayer

Cited by 45 publications

References 49 publications

Structure and dynamics of oxygen adsorbed on Ag(100) vicinal surfaces

Structure and dynamics of oxygen adsorbed on Ag(100) vicinal surfaces

Electronic structure of the Cu-p(2×1)O surface by the semi-empirical LCAO method

Promoting Atoms into Delocalized Long-Living Magnetically Modified State Using Atomic Force Microscopy

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