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• W2024662989 abstract "We report the response of the well-known Shockley-type surface state, which resides around $overline{mathrm{Y}}$ on the $mathrm{Cu}(110)$ surface, to the presence of a lateral one-dimensional (1D) superlattice. This grating consists of alternating stripes of reconstructed $mathrm{Cu}(110)(2ifmmodetimeselsetexttimesfi{}1)mathrm{O}$ and unreconstructed $mathrm{Cu}(110)$ and can be prepared by oxygen dosing over a wide range of stripe widths and distances, respectively. Using high-resolution angle-dependent photoemission at room temperature, we study the variation of binding energy, effective mass, linewidth and energy splitting induced by the confinement perpendicular to the $(2ifmmodetimeselsetexttimesfi{}1)mathrm{O}$ stripes. We demonstrate that the surface state electrons on the striped $mathrm{Cu}text{ensuremath{-}}mathrm{O}$ surface show confinement properties and photoemission spectra in almost complete analogy to the $overline{ensuremath{Gamma}}$-surface state electrons on stepped $mathrm{Cu}(111)$ and $mathrm{Au}(111)$ surface [Mugarza et al., Phys. Rev. Lett. 87, 107601 (2002)]. At low oxygen coverages our data differ from those of an earlier photoemission study of the same system performed with the sample at $100phantom{rule{0.3em}{0ex}}mathrm{K}$ [Bertel and Lehmann, Phys. Rev. Lett. 80, 1497 (1998)], which reports the observation of singularities in the density of states of quasi-1D subbands. However, the two studies agree within experimental error limits for the higher oxygen coverages. We explain the apparent difference by the temperature-induced transition from coherent emission out of 2D superlattice bands to incoherent emission from decoupled 1D quantum well states." @default.
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• W2024662989 date "2004-10-05" @default.
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• W2024662989 title "Surface state confinement in a lateral quantum well: The striped<mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML display=inline><mml:mrow><mml:mi mathvariant=normal>Cu</mml:mi><mml:mrow><mml:mo>(</mml:mo><mml:mrow><mml:mn>110</mml:mn></mml:mrow><mml:mo>)</mml:mo></mml:mrow><mml:mrow><mml:mo>(</mml:mo><mml:mrow><mml:mn>2</mml:mn><mml:mo>×</mml:mo><mml:mn>1</mml:mn></mml:mrow><mml:mo>)</mml:mo></mml:mrow><mml:mi mathvariant=normal>O</mml:mi></mml:mrow></mml:math>surface" @default.
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• W2024662989 doi "https://doi.org/10.1103/physrevb.70.155303" @default.
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