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Title: Visualization of localized perturbations on a (001) surface of the ferromagnetic semimetal EuB 6

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 $$\bar{Γ}$$ 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 $$\bar{Γ}$$ point, contributing to the remarkably strong real-space response around static point defects, which are observed in STM measurements.

Authors:
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Publication Date:
Research Org.:
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES). Materials Sciences & Engineering Division; German Research Foundation (DFG)
OSTI Identifier:
1633007
Alternate Identifier(s):
OSTI ID: 1648111
Report Number(s):
LA-UR-20-24844
Journal ID: ISSN 2469-9950; PRBMDO; 235421
Grant/Contract Number:  
89233218CNA000001
Resource Type:
Published Article
Journal Name:
Physical Review B
Additional Journal Information:
Journal Name: Physical Review B Journal Volume: 101 Journal Issue: 23; Journal ID: ISSN 2469-9950
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; material science; density of states; electronic structure; first-principles calculations; polarons; surface states; ferromagnets; semimetals; density functional calculations; scanning tunneling microscopy

Citation Formats

Rößler, Sahana, Jiao, Lin, Seiro, Silvia, Rosa, Priscila F. S., Fisk, Zachary, Rößler, Ulrich K., and Wirth, Steffen. Visualization of localized perturbations on a (001) surface of the ferromagnetic semimetal EuB 6. United States: N. p., 2020. Web. doi:10.1103/PhysRevB.101.235421.
Rößler, Sahana, Jiao, Lin, Seiro, Silvia, Rosa, Priscila F. S., Fisk, Zachary, Rößler, Ulrich K., & Wirth, Steffen. Visualization of localized perturbations on a (001) surface of the ferromagnetic semimetal EuB 6. United States. doi:https://doi.org/10.1103/PhysRevB.101.235421
Rößler, Sahana, Jiao, Lin, Seiro, Silvia, Rosa, Priscila F. S., Fisk, Zachary, Rößler, Ulrich K., and Wirth, Steffen. Thu . "Visualization of localized perturbations on a (001) surface of the ferromagnetic semimetal EuB 6". United States. doi:https://doi.org/10.1103/PhysRevB.101.235421.
@article{osti_1633007,
title = {Visualization of localized perturbations on a (001) surface of the ferromagnetic semimetal EuB 6},
author = {Rößler, Sahana and Jiao, Lin and Seiro, Silvia and Rosa, Priscila F. S. and Fisk, Zachary and Rößler, Ulrich K. and Wirth, Steffen},
abstractNote = {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 $\bar{Γ}$ 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 $\bar{Γ}$ point, contributing to the remarkably strong real-space response around static point defects, which are observed in STM measurements.},
doi = {10.1103/PhysRevB.101.235421},
journal = {Physical Review B},
number = 23,
volume = 101,
place = {United States},
year = {2020},
month = {6}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record
DOI: https://doi.org/10.1103/PhysRevB.101.235421

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