Visualization of localized perturbations on a (001) surface of the ferromagnetic semimetal EuB6

Loading...
Thumbnail Image
Date
2020
Volume
101
Issue
23
Journal
Series Titel
Book Title
Publisher
College Park, MD : American Physical Society
Abstract

We performed scanning tunneling microscopy (STM) and spectroscopy on a (001) surface of the ferromagnetic semimetal EuB6. Large-amplitude oscillations emanating from the elastic scattering of electrons by the surface impurities are observed in topography and in differential conductance maps. Fourier transform of the conductance maps embracing these regions indicate a holelike dispersion centered around the Γ point of the two-dimensional Brillouin zone. Using density functional theory slab calculations, we identify a spin-split surface state, which stems from the dangling pz orbitals of the apical boron atom. Hybridization with bulk electronic states leads to a resonance enhancement in certain regions around the Γ point, contributing to the remarkably strong real-space response around static point defects, which are observed in STM measurements.

Description
Keywords
Elastic scattering, Electron spin resonance spectroscopy, Ferromagnetic materials, Ferromagnetism, Point defects, Scanning tunneling microscopy, Topography, Brillouin zones, Bulk electronic state, Differential conductances, Gamma point, Large amplitude oscillation, Localized perturbation, Resonance enhancement, Surface impurities, Density functional theory
Citation
Rößler, S., Jiao, L., Seiro, S., Rosa, P. F. S., Fisk, Z., Rößler, U. K., & Wirth, S. (2020). Visualization of localized perturbations on a (001) surface of the ferromagnetic semimetal EuB6. 101(23). https://doi.org//10.1103/PhysRevB.101.235421
Collections
License
CC BY 4.0 Unported