Determination of the energy-momentum densities of aluminium by electron momentum spectroscopy

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Vos, M.Research School of Physical Sciences and Engineering, Institute of Advanced Studies, ANU, Canberra, A.C.T. 0200, Australia (författare)

The energy-resolved momentum densities of thin polycrystalline aluminium films have been measured using electron momentum spectroscopy (EMS), for both the valence band and the outer core levels. The spectrometer used for these measurements has energy and momentum resolutions of around 1.0 eV and 0.15 atomic units, respectively. These measurements should, in principle, describe the electronic structure of the film very quantitatively, i.e. the dispersion and the intensity can be compared directly with theoretical spectral momentum densities for both the valence band and the outer core levels. Multiple scattering is found to hamper the interpretation somewhat. The core-level intensity distribution was studied with the main purpose of setting upper bounds on these multiple-scattering effects. Using this information we wish to obtain a full understanding of the valence band spectra using different theoretical models of the spectral function. These theoretical models differ significantly and only the cumulant expansion calculation that takes the crystal lattice into account seems to describe the data reasonably well.

Kheifets, A. S.Research School of Physical Sciences and Engineering, Institute of Advanced Studies, ANU, Canberra, A.C.T. 0200, Australia (författare)
Weigold, E.Research School of Physical Sciences and Engineering, Institute of Advanced Studies, ANU, Canberra, A.C.T. 0200, Australia (författare)
Canney, S. A.Electronic Structure of Materials Centre, Flinders University of South Australia, GPO Box 2100, Adelaide, S.A. 5001, Australia (författare)
Holm, B.Department of Applied Physics, Chalmers University of Technology and Göteborg University, Sweden (författare)
Aryasetiawan, F.Joint Research Centre for Atom Technology, Angstrom Technology Partnership, 1-1-4 Higashi, Tsukuba, Ibaraki 305, Japan (författare)
Karlsson, Krister,1961-Högskolan i Skövde,Institutionen för naturvetenskap(Swepub:his)karr (författare)
Research School of Physical Sciences and Engineering, Institute of Advanced Studies, ANU, Canberra, A.C.T. 0200, AustraliaElectronic Structure of Materials Centre, Flinders University of South Australia, GPO Box 2100, Adelaide, S.A. 5001, Australia (creator_code:org_t)

Ingår i:Journal of Physics: Institute of Physics Publishing (IOPP)11:18, s. 3645-36610953-89841361-648X

Av författaren/redakt...: Vos, M.; Kheifets, A. S.; Weigold, E.; Canney, S. A.; Holm, B.; Aryasetiawan, F.; visa fler...; Karlsson, Kriste ...; visa färre...

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