Abstract
Two-dimensional spin-uncompensated momentum density distributions, $\rho_{\rm s}^{2D}({\bf p})$s, were reconstructed in magnetite at 12K and 300K from several measured directional magnetic Compton profiles. Mechanical de-twinning was used to overcome severe twinning in the single crystal sample below the Verwey transition. The reconstructed $\rho_{\rm s}^{2D}({\bf p})$ in the first Brillouin zone changes from being negative at 300 K to positive at 12 K. This result provides the first clear evidence that electrons with low momenta in the minority spin bands in magnetite are localized below the Verwey transition temperature.
Keywords
condensed matter, strongly correlated electrons, Verwey temperature, magnetic Compton profiles, $\rho_{\rm s}^{2D}({\bf p})$s
Subject Categories
Condensed matter, Magnetite
Disciplines
Physics
Publication Date
2009
Permanent URL
Recommended Citation
Kobayashi, Hisao; Nagao, Toshihiro; Itou, Masayoshi; Todo, Sakae; Barbiellini, Bernardo; Mijnarends, Peter E.; Bansil, Arun; and Sakai, Nobuhiko, "Direct observation of localization of the minority-spin-band electrons in magnetite below the Verwey temperature" (2009). Physics Faculty Publications. Paper 129. http://hdl.handle.net/2047/d20000740
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Notes
Originally posted at http://arxiv.org/abs/0908.3685v1. Preprint of an article published in Physical Review B, v.80 no.10, 2009.