Physics
Scientific paper
Apr 2005
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005njph....7..111r&link_type=abstract
New Journal of Physics, Volume 7, Issue 1, pp. 111 (2005).
Physics
5
Scientific paper
Knowledge of the spin-dependent electronic structure at surfaces and interfaces plays an increasingly important role when assessing possible use of novel magnetic materials for spintronic applications. It is shown that spin- and angle-resolved photoelectron spectroscopy together with ab initio electronic structure methods provides a full characterization of the surface electronic structure of ferromagnetic MnSb(0 0 0 1). Two different surface reconstructions have been compared in spin- and angle-resolved valence-band photoemission. For annealing at elevated temperatures, the (1 x 1)-structure transforms into 2 x 2 2 and a majority-spin peak appears at -1.7 eV inside a majority-spin bulk band gap at the surface Brillouin zone centre. Its sensitivity to oxygen supports an interpretation as magnetic compound surface state. Local spin density calculations predict at the same energy (-1.75 eV) a prominent d_{z^2} surface state of majority spin for (1 x 1)-Mn terminated MnSb(0 0 0 1) but no such feature for (1 x 1)-Sb termination. The calculation shows that neither the bulk nor the surface is half-metallic, in agreement with the expectation for the hexagonal NiAs structure.
Akinaga Hiro
Blügel Stefan
Fujimori Atsushi
Kakizaki Akito
Kamakura N.
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