Fermi surface manipulation by external magnetic field demonstrated for a prototypical ferromagnet

Abstract

We consider the details of the near-surface electronic band structure of a prototypical ferromagnet, Fe(001). Using high resolution angle-resolved photoemission spectroscopy we demonstrate openings of the spin-orbit induced electronic band gaps near the Fermi level. The band gaps and thus the Fermi surface can be manipulated by changing the remanent magnetization direction. The effect is of the order of $\Delta$E = 100 meV and $\Delta \text{k}=0.1{\text{A˚}}^{-1}$. We show that the observed dispersions are dominated by the bulk band structure. First-principles calculations and one-step photoemission calculations suggest that the effect is related to changes in the electronic ground state, rather than caused by the photoemission process itself. The symmetry of the effect indicates that the observed electronic bulk states are influenced by the presence of the surface, which might be understood as related to a Rashba-type effect. By pinpointing the regions in the electronic band structure where the switchable band gaps occur, we demonstrate the significance of spin-orbit interaction even for elements as light as 3d ferromagnets.

References in corpus (7)

• First Principles Calculation of Anomalous Hall Conductivity in Ferromagnetic bcc Fe
• Efficient implementation of the GW approximation within the all-electron FLAPW method
• Tunneling anisotropic magnetoresistance and spin-orbit coupling in Fe/GaAs/Au tunnel junctions
• Band convergence and linearization error correction of all-electron GW calculations: The extreme case of zinc oxide
• Tunneling anisotropic magnetoresistance driven by resonant surface states: First-principles calculations of Fe(001) surface
• Microscopic Theory of Rashba Interaction in Magnetic Metal
• Elimination of the linearization error in GW calculations based on the linearized augmented-plane-wave method

Cited by in corpus (2)

• Large-gap magnetic topological heterostructure formed by subsurface incorporation of a ferromagnetic layer
• Large Tunable Anomalous Hall Effect in the Kagom$\acute{e}$ Antiferromagnet U${}_3$Ru${}_4$Al${}_{12}$