Speakers: Václav Drchal (Department of Condensed Matter Theory, FZÚ AV ČR, v.v.i.)
Place: Na Slovance, přednáškový sál v přízemí
Presented in English
Organisers:
Department of Condensed Matter Theory
Abstract: We have calculated the electronic structure and angle-resolved photoemission spectra of Heusler alloys from first principles using the TB-LMTO method. The disorder, caused either by non-stoichiometry, or by swapping of atoms between sublattices is treated within the CPA. Matrix elements are included within the dipole approximation. Theoretical results are compared with experimental data of a weakly off-stoichiometric Ni49.7Mn29.1Ga21.2 alloy that were measured by a photoelectron microscope at the NanoESCA beamline of the Elettra synchrotron. We will discuss the dependence of spectra on the structure (austenite vs. martensite) and the role played by disorder.
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