Photoelectric Work Function of a Copper Single Crystal for the (100), (110), (111), and (112) Faces

Gartland, P.; Berge, Stig; Slagsvold, B.J.

doi:10.1103/physrevlett.28.738

Cited by 247 publications

(125 citation statements)

References 5 publications

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“…We calculate W Cu = 3.9 eV, which is somewhat lower than the theoretical values, ranging between 4.5 to 5.3 eV, 42 and the experimental value of about 4.65 eV. 43,44 Although the value of the calculated work function depends sensitively on the used parameters, we find that the transmission coefficient does not change significantly. The value for EuO, i.e., W EuO = 1.8 eV, is in good agreement with the experimental value of 1.7 eV.…”

Section: Spin Transport Properties Of the Euo Junction At Zero Biasmentioning

confidence: 78%

Electronic transport through EuO spin-filter tunnel junctions

et al. 2012

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Epitaxial spin-filter tunnel junctions based on the ferromagnetic semiconductor europium monoxide (EuO) are investigated by means of density functional theory. In particular, we focus on the spin transport properties of Cu(100)/EuO(100)/Cu(100) junctions. The dependence of the transmission coefficient and the current-voltage curves on the interface spacing and EuO thickness is explained in terms of the EuO density of states and the complex band structure. Furthermore, we also discuss the relation between the spin transport properties and the Cu-EuO interface geometry. The level alignment of the junction is sensitively affected by the interface spacing, since this determines the charge transfer between EuO and the Cu electrodes. Our calculations indicate that EuO epitaxially grown on Cu can act as a perfect spin filter, with a spin polarization of the current close to 100%, and with both the Eu-5d conduction-band and the Eu-4f valence-band states contributing to the coherent transport. For epitaxial EuO on Cu, a symmetry filtering is observed, with the 1 states dominating the transmission. This leads to a transport gap larger than the fundamental EuO band gap. Importantly, the high spin polarization of the current is preserved up to large bias voltages.

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Section: Spin Transport Properties Of the Euo Junction At Zero Biasmentioning

confidence: 78%

Electronic transport through EuO spin-filter tunnel junctions

et al. 2012

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“…The activation energy required to capture an electron will be associated with the work function. The work function difference between Cu(ll1) and Cu(l IO) (11 [25] to 14 kcaljmol [6]) equals approximately the difference between the activation energies for the NzO decomposition on both planes (12.4 kcal/mol).…”

Section: Discussion Of the No Decompasitionmentioning

confidence: 99%

The kinetics of the interactions of O2 and N20 with a Cu(110) surface and of the reaction of CO with adsorbed oxygen studied by means of ellipsometry, AES and LEED

1979

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Ellipsometry, LEED and Auger electron spectroscopy have been used to study the interactions of Oa and NzO with a clean annealed Cu(ll0) surface and the reaction of CO with adsorbed oxygen in the monolayer range. Gas pressures were in the range 1O-8-1O-4 Torr and crystal temperatures varied between 23-4OO'C. The changes in the ellipsometric angles A and $I per oxygen atom upon adsorption and removal of oxygen depend on the coverage 0, the temperature and on the azimuth of the plane of incidence of the light beam. The kinetics of the chemisorption of oxygen is independent of the crystal temperature, initial sticking probabiiity ~0.2. The LEED data and the adsorption kinetics indicate an attractive interaction in the adsorbed layer in the [OOl] direction. The initial decomposition probabi~~y of NaO at room temperature is 0.15 and decreases with increasing temperature; the maximum coverage is 0.5 monolayer. The LEED patterns observed were the same as those with 0s. The reaction probability of CO with adsorbed oxygen increases with decreasing oxygen coverage (order of mag nitude -1O-5, apparent activation energy -6 kcaI/mol). This increase has been attributed to the operation of the Langmuir-Hinshelwood mechanism.

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“…[4], the key parameters determining the stability of various charge states are discussed within a simple model. Based on this model, we ascribe the spontaneous decay of the Au 0 and Au þ charge states on NaCl films grown on Cu(311) to the significantly reduced work function of Cu(311) (4.31 eV [27], as compared to 4.59 eV for Cu(100) and 4.94 eV for Cu(111) [28]), which shifts the affinity level of Au 0 for an unrelaxed ion lattice closer to the Fermi level of the Cu(311) substrate (≈0.8 eV above E F [29]). Since this affinity level is phonon broadened, phonon-mediated charging of the Au adatom by an electron tunneling from the Cu(311) substrate through the NaCl film becomes a possible process.…”

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confidence: 99%

Manipulation of the Charge State of Single Au Atoms on Insulating Multilayer Films

et al. 2015

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We show charge-state manipulation of single Au adatoms on 2-11 monolayer (ML) thick NaCl films on Cu surfaces by attaching or detaching single electrons via the tip of an atomic force microscope (AFM). Tristate charge control (neutral, negatively charged, and positively charged) is achieved. On Cu(100) and Cu(111) supports, charge tristability is achieved independently of the NaCl layer thickness. In contrast, on Cu(311), only Au anions are stable on the thinnest NaCl films, but neutral and positive charge states become sufficiently long lived on films thicker than 4 ML to allow AFM-based charge-state-manipulation experiments.

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Photoelectric Work Function of a Copper Single Crystal for the (100), (110), (111), and (112) Faces

Cited by 247 publications

References 5 publications

Electronic transport through EuO spin-filter tunnel junctions

Electronic transport through EuO spin-filter tunnel junctions

The kinetics of the interactions of O2 and N20 with a Cu(110) surface and of the reaction of CO with adsorbed oxygen studied by means of ellipsometry, AES and LEED

Manipulation of the Charge State of Single Au Atoms on Insulating Multilayer Films

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