Photoemission experiments on copper

Courths, R.; Hüfner, S.

doi:10.1016/0370-1573(84)90167-4

Cited by 318 publications

(107 citation statements)

References 209 publications

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“…The increasing barrier strength for high-step densities, which has been also shown in previous analysis [11], might not have physical sense. At very large miscut angles, the surface state is expected to evolve towards theM surface state of the (1 0 0) surface (α = 55 • ) near E F [19,20], and it is entirely determined from the features of the L-neck gap projected at M [21]. On the other hand, the barrier strength significantly increases for d > 40 Å, i.e.…”

Section: Discussionmentioning

confidence: 99%

One-dimensional versus two-dimensional electronic states in vicinal surfaces

et al. 2005

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Section: Discussionmentioning

confidence: 99%

One-dimensional versus two-dimensional electronic states in vicinal surfaces

et al. 2005

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“…The observed peak shift withhω is not symmetric aroundhω = 16.2 eV, as might be expected from the symmetry along the Σ-direction in the Brillouin zone. We attribute this to the presence of the well-known band gap above the Fermi level 20,22 : Photoelectrons excited withhω = 17−21 eV cannot couple to the corresponding bulk states. In consequence, only "surface emission" 13,20 into evanescent final states contributes to the photoemission intensity, which drops significantly within this photon-energy region.…”

Section: B Linewidth Informationmentioning

confidence: 94%

Lifetime ofdholes at Cu surfaces: Theory and experiment

et al. 2001

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We have investigated the hole dynamics at copper surfaces by high-resolution angle-resolved photoemission experiments and many-body quasiparticle GW calculations. Large deviations from a free-electron-like picture are observed both in the magnitude and the energy dependence of the lifetimes, with a clear indication that holes exhibit longer lifetimes than electrons with the same excitation energy. Our calculations show that the small overlap of d-and sp-states below the Fermi level is responsible for the observed enhancement. Although there is qualitative good agreement of our theoretical predictions and the measured lifetimes, there still exist some discrepancies pointing to the need of a better description of the actual band structure of the solid.

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“…In particular, we will give a general overview of angleresolved photoemission spectroscopy (so-called ARPES), a highly advanced spectroscopic method that allows the direct experimental study of the momentum-dependent electronic band structure of solids. For a further discussion of ARPES and other spectroscopic techniques based on the detection of photoemitted electrons, we refer the reader to the extensive literature available on the subject [3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,32,33,34].…”

Section: Introductionmentioning

confidence: 99%

Probing the Electronic Structure of Complex Systems by ARPES

2004

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Angle-resolved photoemission spectroscopy (ARPES) is one of the most direct methods of studying the electronic structure of solids. By measuring the kinetic energy and angular distribution of the electrons photoemitted from a sample illuminated with sufficiently high-energy radiation, one can gain information on both the energy and momentum of the electrons propagating inside a material. This is of vital importance in elucidating the connection between electronic, magnetic, and chemical structure of solids, in particular for those complex systems which cannot be appropriately described within the independent-particle picture. The last decade witnessed significant progress in this technique and its applications, thus ushering in a new era in photoelectron spectroscopy; today, ARPES experiments with 2 meV energy resolution and 0.2• angular resolution are a reality even for photoemission on solids. In this paper we will review the fundamentals of the technique and present some illustrative experimental results; we will show how ARPES can probe the momentum-dependent electronic structure of solids providing detailed information on band dispersion and Fermi surface, as well as on the strength and nature of those many-body correlations which may profoundly affect the one-electron excitation spectrum and, in turn, determine the macroscopic physical properties.

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Photoemission experiments on copper

Cited by 318 publications

References 209 publications

One-dimensional versus two-dimensional electronic states in vicinal surfaces

One-dimensional versus two-dimensional electronic states in vicinal surfaces

Lifetime ofdholes at Cu surfaces: Theory and experiment

Probing the Electronic Structure of Complex Systems by ARPES

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