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Your search keyword '"Starnberg, H. I."' showing total 114 results
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114 results on '"Starnberg, H. I."'

1. Deposition of Ca on the 2H–NbSe2 surface: Competing processes.

Author

Starnberg, H. I.

Subjects
*PHOTOELECTRON spectroscopy, *INTERCALATION reactions, *GRAPHITE intercalation compounds, *CLATHRATE compounds
Abstract

The interaction of Ca evaporated in vacuum onto a 2H–NbSe2 surface held at room temperature was studied by photoelectron spectroscopy. Indications of an intercalation reaction were observed initially, but larger Ca depositions resulted in a layer-breaking reaction producing a disordered overlayer of varying compositions. The layer-breaking reaction is likely due to the intercalation compound becoming unstable as the local Ca concentration exceeds the threshold value. Continued Ca depositions eventually resulted in the growth of three-dimensional islands of Ca metal, exposing relatively unaffected NbSe2 layers between the Ca islands. [ABSTRACT FROM AUTHOR]

Published
2024
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6. Stabilization of the misfit layer compound (PbS)1.13TaS2 by metal cross substitution

Author

Kalläne, M., Rossnagel, K., Marczynski-Bühlow, M., Kipp, L., Starnberg, H. I., and Stoltz, S. E.

Subjects
ddc:550
Abstract

Photoemission microspectroscopy on the layered misfit compound (PbS)1.13TaS2 provides direct evidence for Ta substitution into PbS layers as well as for Pb substitution into TaS2 layers. This metal cross substitution alters the charge balance between alternating layers and can explain the remarkable stability of (PbS)1.13TaS2 and, possibly, of analogous misfit compounds. It is suggested that even formally stoichiometric misfit compounds can be stabilized by this mechanism.

Published
2007
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8. Three-dimensional unoccupied band structure of graphite

Author

Strocov, Vladimir, Blaha, P., Starnberg, H. I., Rohfling, M., Claessen, Ralph (Prof.), Debever, J.-M., and Themlin, J.-M.

Abstract

Three-dimensional unoccupied band structure of graphite : very-low-energy electron diffraction and band calculations / R. Claessen ... - In: Physical review. B. 61. 2000. S. 4994-5001

Published
2000

9. Atomic origin of the scanning tunneling microscopy images of charge-density-waves on 1T-TaSe2

Author

Stoltz, D., Bielmann, M., Schlapbach, L., Bovet, M., Berger, H., Göthelid, Mats, Stoltz, S. E., Starnberg, H. I., Stoltz, D., Bielmann, M., Schlapbach, L., Bovet, M., Berger, H., Göthelid, Mats, Stoltz, S. E., and Starnberg, H. I.

Abstract

We show atomically resolved scanning tunneling microscopy (STM) images of charge density waves (CDWs) at room temperature together with angle-resolved photoelectron band-mapping of 1T-TaSe2. By comparing the results of these two techniques, we demonstrate the atomic structure of the CDW-features observed by the STM and atomic origin of the reconstructed band-structure in this material., QC 20100525

Published
2008
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11. Three-dimensional band mapping by angle-dependent very-low-energy electron diffraction and photoemission : Methodology and application to Cu

Author

Strocov, Vladimir N., Claessen, Ralph, Nicolay, Georg, Hüfner, Stefan, Kimura, Akio, Harasawa, Ayumi, Shin, Shik, Kakizaki, Akito, Starnberg, H. I., Nilsson, P. O., Blaha, Peter, Strocov, Vladimir N., Claessen, Ralph, Nicolay, Georg, Hüfner, Stefan, Kimura, Akio, Harasawa, Ayumi, Shin, Shik, Kakizaki, Akito, Starnberg, H. I., Nilsson, P. O., and Blaha, Peter

Abstract

type:text, A method of band mapping providing full control of the three-dimensional k is described in detail. Angle-dependent very-low-energy electron diffraction is applied to determine the photoemission final states along a Brillouin zone symmetry line parallel to the surface; photoemission out of these states is then utilized to map the valence bands in the constant-final-state mode. The method naturally incorporates the non-free-electron and excited-state self-energy effects in the unoccupied band, resulting in an accuracy superior over conventional techniques. Moreover, its intrinsic accuracy is less limited by lifetime broadening. As a practical advantage, the method provides access to a variety of lines in the Brillouin zone using only one crystal surface. We extensively tested the method on Cu. Several new aspects of the electronic structure of this metal are determined, including non-free-electron behavior of unoccupied bands and missing pieces of the valence band.

Published
2001

14. Absolute Band Mapping by Combined Angle-Dependent Very-Low-Energy Electron Diffraction and Photoemission : Application to Cu

Author

Strocov, Vladimir N., Claessen, Ralph, Nicolay, Georg, Hüfner, Stefan, Kimura, Akio, Harasawa, Ayumi, Shin, Shik, Kakizaki, Akito, Nilsson, P. O., Starnberg, H. I., Blaha, Peter, Strocov, Vladimir N., Claessen, Ralph, Nicolay, Georg, Hüfner, Stefan, Kimura, Akio, Harasawa, Ayumi, Shin, Shik, Kakizaki, Akito, Nilsson, P. O., Starnberg, H. I., and Blaha, Peter

Abstract

We present an experimental method to determine the electronic E(k) band structure in crystalline solids absolutely, i.e., with complete control of the three-dimensional wave vector k. Angle-dependent very-low-energy electron diffraction is first applied to determine the unoccupied states whose k is located on a high-symmetry line parallel to the surface. Photoemission via these states, employing the constant-final-state mode, is then utilized to map the valence bands along this line. We demonstrate the method by application to Cu. and find significant deviation from free-electron-like behavior in the unoccupied states, and from density-functional theory in the occupied slates.

Published
1998

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