Signatures of Dirac fermion-mediated magnetic order

Abstract

The spin-momentum locking of topological states offers an ideal platform to explore novel magneto-electric effects. These intimately depend on the ability to manipulate the spin texture in a controlled way. Here, we combine scanning tunneling microscopy with single atoms deposition to map the evolution of topological states under the influence of different magnetic perturbations. We obtain signatures of Dirac fermion-mediated magnetic order for extremely dilute adatoms concentrations. This striking observation is found to critically depend on the single adatoms magnetic anisotropy and the position of the Fermi level. Our findings open new perspectives in spin engineering topological states at the atomic scale and pave the way to explore novel spin-related topological phenomena with promising potential for applications.

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Cited by in corpus (14)

• Imaging Dirac-Mass Disorder from Magnetic Dopant-Atoms in the Ferromagnetic Topological Insulator Cr${}_x$(Bi${}_{0.1}$Sb${}_{0.9}$)${}_{2-x}$Te${}_3$
• Probing topological quantum matter with scanning tunnelling microscopy
• Dimensional Crossover Induced Topological Hall Effect in a Magnetic Topological Insulator
• Filling of magnetic-impurity-induced gap in topological insulators by potential scattering
• Systematics of molecular self-assembled networks at topological insulators surfaces
• Mapping the effect of defect-induced strain disorder on the Dirac states of topological insulators
• Single electron gating of topological insulators
• Interaction effects in a 1D flat band at a topological crystalline step edge
• Ambi-chiral anomalous Hall effect in magnetically doped topological insulators
• Distinguishing Surface and Bulk Electromagnetism via Their Dynamics in an Intrinsic Magnetic Topological Insulator
• Topological insulator in a helicoidal magnetization field
• Robust topological state against magnetic impurities observed in superconductor PbTaSe2
• Spin-polarized scanning tunneling microscopy measurement scheme for determining the quantum geometric tensor
• Bulk and surface electron scattering in disordered Bi${}_2$Te${}_3$ probed by quasiparticle interference