Electron pair emission detected by time-of-flight spectrometers: Recent progress

Journal Article · Mon Feb 10 00:00:00 EST 2014 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.4864274· OSTI ID:22283169

Huth, Michael; Schumann, Frank O. ^[1]; Chiang, Cheng-Tien; Trützschler, Andreas; Kirschner, Jürgen ^[1]; Widdra, Wolf ^[2]

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1. Max Planck Institute of Microstructure Physics, Weinberg 2, D-06120 Halle (Germany)
2. Institute of Physics, Martin-Luther-Universität Halle-Wittenberg, Von-Danckelmann-Platz 3, D-06120 Halle (Saale) (Germany)

We present results for electron coincidence spectroscopy using two time-of-flight (ToF) spectrometers. Excited by electron impact, the energy and momentum distribution of electron pairs emitted from the Cu(111) surface are resolved and a spectral feature related to the Shockley surface state is identified. By combining the two ToF spectrometers with a high-order harmonic generation light source, we demonstrate double photoemission spectroscopy in the laboratory that required synchrotron radiation in the past. Utilizing this setup, we report results for (γ,2e) on NiO(001) on Ag(001) excited with light at 30 eV photon energy.

• OSTI ID: 22283169
• Journal Information: Applied Physics Letters, Vol. 104, Issue 6; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
COINCIDENCE SPECTROMETRY
COPPER
CRYSTAL STRUCTURE
ELECTRON PAIRS
ELECTRONS
EMISSION SPECTROSCOPY
HARMONIC GENERATION
LIGHT SOURCES
NICKEL OXIDES
PHOTOEMISSION
PHOTONS
SURFACES
SYNCHROTRON RADIATION
TIME-OF-FLIGHT METHOD
TIME-OF-FLIGHT SPECTROMETERS
VISIBLE RADIATION