Physics Faculty Publications

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.

Notes

Originally posted at http://arxiv.org/abs/0908.3685v1. Preprint of an article published in Physical Review B, v.80 no.10, 2009.

Keywords

condensed matter, strongly correlated electrons, Verwey temperature, magnetic Compton profiles, $\rho_{\rm s}^{2D}({\bf p})$s

Subject Categories

Condensed matter, Magnetite

Physics

2009

Permanent URL

http://hdl.handle.net/2047/d20000740

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