Direct observation of localization in the minority-spin-band electrons of magnetite below the Verwey temperature

Abstract

Two-dimensional spin-uncompensated momentum density distributions, ${\rho }_{\mathrm{s}}^{2D}(\mathbf{p})$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 ${\rho }_{\mathrm{s}}^{2D}(\mathbf{p})$ 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.

arXiv comment13 pages, 4 figures, accepted in Physical Review B

References in corpus (8)

• Long Range Charge Ordering in Magnetite Below the Verwey Transition
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Cited by in corpus (1)

• Charge order at magnetite Fe3O4(001): surface and Verwey phase transitions