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

被引：6

作者：

Roessler, Sahana ^{[1
]}

Jiao, Lin ^{[1
,5
,6
]}

Seiro, Silvia ^{[1
,4
]}

Rosa, Priscila F. S. ^{[2
,3
]}

Fisk, Zachary ^{[2
]}

Roessler, Ulrich K. ^{[4
]}

Wirth, Steffen ^{[1
]}

机构：

[1] Max Planck Inst Chem Phys Solids, Nothnitzer Str 40, D-01187 Dresden, Germany

[2] Univ Calif Irvine, Dept Phys, Irvine, CA 92697 USA

[3] Los Alamos Natl Lab, Condensed Matter & Magnet Sci Grp, Los Alamos, NM 87545 USA

[4] IFW Dresden, Helmholtzstr 20, D-01069 Dresden, Germany

[5] Univ Illinois, Dept Phys, Urbana, IL 61801 USA

[6] Univ Illinois, Frederick Seitz Mat Res Lab, Urbana, IL 61801 USA

来源：

PHYSICAL REVIEW B | 2020年 / 101卷 / 23期

关键词：

ELECTRONIC-STRUCTURE; MAGNETIC ORDER; FERMI-SURFACE; HEXABORIDES; DEPENDENCE; TRANSPORT;

D O I：

10.1103/PhysRevB.101.235421

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

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 (Gamma) over bar 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 p(z) orbitals of the apical boron atom. Hybridization with bulk electronic states leads to a resonance enhancement in certain regions around the (Gamma) over bar point, contributing to the remarkably strong real-space response around static (Gamma) over bar point defects, which are observed in STM measurements.

引用

页数：9

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