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Angle-resolved phot...
Angle-resolved photoemission study of dispersive and narrow-band 5f states in UAsSe
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Guziewicz, E. (författare)
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Durakiewicz, T. (författare)
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- Oppeneer, Peter (författare)
- Uppsala universitet,Fysiska institutionen,Teoretisk magnetism
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Joyce, J. J. (författare)
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Thompson, J. D. (författare)
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Olson, C. G. (författare)
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Butterfield, M. T. (författare)
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Wojakowski, A. (författare)
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Moore, D. P. (författare)
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Arko, A. J. (författare)
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(creator_code:org_t)
- 2006
- 2006
- Engelska.
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Ingår i: PHYSICAL REVIEW B. - 1098-0121. ; 73:15, s. 155119-
- Relaterad länk:
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http://link.aps.org/...
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- Single crystals of ferromagnetic UAsSe have been investigated by angle-resolved photoemission spectroscopy (ARPES) in the photon energy range between 20 eV and 110 eV. Electron kinetic energy intensities are collected as a function of angle and mapped onto the materials reciprocal space. Energy-band mapping has been carried out both for a several-eV-wide energy interval as well as for a narrow energy interval of less than 1 eV from the Fermi energy. The main features of the deduced energy bands can be explained by band-structure calculations. In the interval close to the Fermi energy, the very high energy and momentum resolution allows the observation of a narrow, yet dispersive photoemission peak mainly of 5f character situated within 50 meV of the Fermi energy. The Lorentzian linewidth was found to be about 35 meV with a dispersion of 30 meV along the Gamma to Z direction and 40 meV dispersion along the Gamma to X direction in the Brillouin zone. We have also found broader (linewidth about 70 meV), hybridized f-character bands with a conventional dispersion of about 1 eV along the Gamma to X and the Z to R directions in the Brillouin zone. An intriguing electronic structure emerges for UAsSe in which both relatively dispersive and narrow 5f bands are present. The occurrence of 5f-band dispersions stipulates that the electronic structure of UAsSe requires lattice periodicity to be taken into account.
Nyckelord
- ELECTRONIC-STRUCTURE
- PHOTOELECTRON-SPECTROSCOPY
- ELECTRICAL-RESISTIVITY
- NEUTRON-DIFFRACTION
- SINGLE-CRYSTALS
- DELTA-PLUTONIUM
- URANIUM
- METALS
- FERROMAGNETS
- MAGNETISM
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
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Till lärosätets databas
- Av författaren/redakt...
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Guziewicz, E.
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Durakiewicz, T.
-
Oppeneer, Peter
-
Joyce, J. J.
-
Thompson, J. D.
-
Olson, C. G.
-
visa fler...
-
Butterfield, M. ...
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Wojakowski, A.
-
Moore, D. P.
-
Arko, A. J.
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visa färre...
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PHYSICAL REVIEW ...
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Uppsala universitet