Anisotropic response of defect bound states to magnetic field in epitaxial FeSn films
arXiv:2503.08072 · doi:10.1021/acs.nanolett.4c05337
Abstract
Crystal defects, whether intrinsic or engineered, drive many fundamental phenomena and novel functionalities of quantum materials. Here, we report symmetry-breaking phenomena induced by Sn-vacancy defects on the surface of epitaxial Kagome antiferromagnet FeSn films using low-temperature scanning tunneling microscopy and spectroscopy. Near the Sn-vacancy defects, anisotropic quasiparticle interference patterns are observed in the differential conductance dI/dV maps, indicating two-fold electronic states that break the 6-fold rotational symmetry of the Kagome layer. Furthermore, the Sn-vacancy defects induce bound states that exhibit anomalous Zeeman shifts under an out-of-plane magnetic field, where their energy shifts linearly towards higher energy independent of the direction of the magnetic field. Under an in-plane magnetic field, the shift of the bound state energy also shows a two-fold oscillating behavior as a function of the azimuth angle. These findings demonstrate defect-enabled new functionalities in Kagome antiferromagnets for potential applications in nanoscale spintronic devices.
arXiv comment17 Pages, 4 figures
References in corpus (31)
- The nitrogen-vacancy colour centre in diamond
- Massive Dirac fermions in a ferromagnetic kagome metal
- Magnetic Weyl Semimetal Phase in a Kagome Crystal
- Large anomalous Nernst effect at room temperature in a chiral antiferromagnet
- Dirac fermions and flat bands in the ideal kagome metal FeSn
- Imaging the Effects of Individual Zinc Impurity Atoms on Superconductivity in Bi2Sr2CaCu2O8+delta
- Fermi-arc diversity on surface terminations of the magnetic Weyl semimetal Co3Sn2S2
- Discovery of a quantum limit Chern magnet TbMn6Sn6
- Negative flat band magnetism in a spin-orbit coupled correlated kagome magnet
- Large magneto-optical Kerr effect and imaging of magnetic octupole domains in an antiferromagnetic metal
- Giant and anisotropic many-body spin-orbit tunability in a strongly correlated kagome magnet
- Interplay of magnetism and high-Tc superconductivity at individual Ni impurity atoms in Bi2Sr2CaCu2O8+d
- Twofold symmetry of -axis resistivity in topological kagome superconductor CsVSb with in-plane rotating magnetic field
- Three-state nematicity and magneto-optical Kerr effect in the charge density waves in kagome superconductors
- Intertwined magnetism and charge density wave order in kagome FeGe
- Discovery of charge order and corresponding edge state in kagome magnet FeGe
- Dirac Fermions in Antiferromagnetic FeSn Kagome Lattices with Combined Space Inversion and Time Reversal Symmetry
- Localized spin-orbit polaron in magnetic Weyl semimetal CoSnS
- Experimental Demonstration of the Sign Reversal of the Order Parameter in (Li1-xFex)OHFe1-yZnySe
- Spin excitations in metallic kagome lattice FeSn and CoSn
- Spin-orbit quantum impurity and quantization in a topological magnet
- Intertwining of magnetism and charge ordering in kagome FeGe
- Directly visualizing the sign change of d-wave superconducting gap in Bi2Sr2CaCu2O8+δ by phase-referenced quasiparticle interference
- Sign changing pairing in single layer FeSe/SrTiO3 revealed by nonmagnetic impurity bound states
- Colossal orbital Zeeman effect driven by tunable spin-Berry curvature in a kagome metal
- Giant periodic pseudo-magnetic fields in strained kagome magnet FeSn epitaxial films on SrTiO(111) substrate
- Compass-like manipulation of electronic nematicity in SrRuO
- Visualizing symmetry-breaking electronic orders in epitaxial Kagome magnet FeSn films
- Atomically-precise engineering of spin-orbit polarons in a kagome magnetic Weyl semimetal
- Determination of the Superconducting Order Parameter from Defect Bound State Quasiparticle Interference
- Extracting phase information about the superconducting order parameter from defect bound states