Controllable magnetic doping of the surface state of a topological insulator

Abstract

A combined experimental and theoretical study of doping individual Fe atoms into Bi2Se3 is presented. It is shown through a scanning tunneling microscopy study that single Fe atoms initially located at hollow sites on top of the surface (adatoms) can be incorporated into subsurface layers by thermally-activated diffusion. Angle-resolved photoemission spectroscopy in combination with ab-initio calculations suggest that the doping behavior changes from electron donation for the Fe adatom to neutral or electron acceptance for Fe incorporated into substitutional Bi sites. According to first principles calculations within density functional theory, these Fe substitutional impurities retain a large magnetic moment thus presenting an alternative scheme for magnetically doping the topological surface state. For both types of Fe doping, we see no indication of a gap at the Dirac point.

5 pages, 4 figures

References in corpus (6)

• Coexistence of the topological state and a two-dimensional electron gas on the surface of Bi2Se3
• Hedgehog Spin-texture and Berry's Phase tuning in a Magnetic Topological Insulator
• Spatial Fluctuations of Helical Dirac Fermions on the Surface of Topological Insulators
• Magnetic Proximity Effect as a Pathway to Spintronic Applications of Topological Insulators
• Tolerance of topological surface states towards magnetic moments: Fe on Bi2Te3 and Bi2Se3
• In-plane magnetic anisotropy of Fe atoms on Bi${}_2$Se${}_3$(111)

Cited by in corpus (46)

• Colloquium: Topological Band Theory
• Dirac materials
• Electronic structure of quantum materials studied by angle-resolved photoemission spectroscopy
• Highly-ordered wide bandgap materials for quantized anomalous Hall and magnetoelectric effects
• Inhomogeneous Weyl and Dirac semimetals: Transport in axial magnetic fields and Fermi arc surface states from pseudo Landau levels
• Probing Single Vacancies in Black Phosphorus at the Atomic Level
• Evidence for interfacial superconductivity in a bi-collinear antiferromagnetically ordered FeTe monolayer on a topological insulator
• Dual nature of magnetic dopants and competing trends in topological insulators
• Systematics of electronic and magnetic properties in the transition metal doped Sb${}_2$Te${}_3$ quantum anomalous Hall platform
• Filling of magnetic-impurity-induced gap in topological insulators by potential scattering
• Spectroscopic perspective on the interplay between electronic and magnetic properties of magnetically doped topological insulators
• Probing the Electronic Properties of Individual MnPc Molecules Coupled to Topological States
• Spin- and angle-resolved photoemission on topological materials
• Observation of Distinct Bulk and Surface Chemical Environments in a Topological Insulator under Magnetic doping
• Strong out-of-plane magnetic anisotropy of Fe adatoms on Bi${}_2$Te${}_3$
• Band gap engineering by Bi intercalation of graphene on Ir(111)
• Local optical control of ferromagnetism and chemical potential in a topological insulator
• Absence of superconductivity in ultra-thin layers of FeSe synthesized on a topological insulator
• Co atoms on Bi${}_2$Se${}_3$ revealing a coverage dependent spin reorientation transition
• Non-magnetic ground state of Ni adatoms on Te-terminated bismuth chalcogenide topological insulators
• Engineered Near-Perfect Back-Scattering on Surface of Topological Insulator with Non-Magnetic Impurities
• A Molecular Approach for Engineering Interfacial Interactions in Magnetic-Topological Insulator Heterostructures
• Doping-dependent charge- and spin-density wave orderings in a monolayer of Pb adatoms on Si(111)
• Screening and atomic-scale engineering of the potential at a topological insulator surface
• Spontaneous gap generation on the surface of weakly interacting topological insulators using nonmagnetic impurities
• Fermi-arc metals
• Step-edge assisted large scale FeSe monolayer growth on epitaxial Bi2Se3 thin films
• Spin-Polarized Quantum Well States on Bi${}_{2-x}$Fe${}_x$Se${}_3$
• Angle-resolved and core-level photoemission study of interfacing the topological insulator Bi1.5Sb0.5Te1.7Se1.3 with Ag, Nb and Fe
• Growth, Morphology and Stability of Au in Contact with the Bi2Se3(0001) Surface
• Structural and electronic properties of ultrathin FeSe films grown on Bi${}_2$Se${}_3$(0001) studied by STM/STS
• Robust Gapless Surface State against Surface Magnetic Impurities on (Bi${}_{0.5}$Sb${}_{0.5}$)${}_2$Te${}_3$ Evidenced by In Situ Magnetotransport Measurements
• Double Fe-impurity charge state in the topological insulator Bi${}_2$Se${}_3$
• Long-time relaxation dynamics of a spin coupled to a Chern insulator
• Driving Topological Phases by Spatially Inhomogeneous Pairing Centers
• Ab initio investigation of impurity-induced in-gap states in Bi${}_2$Te${}_3$ and Bi${}_2$Se${}_3$
• Single atom anisotropic magnetoresistance on a topological insulator surface
• Spin dynamics of $3d$ and $4d$ impurities embedded in prototypical topological insulators
• Band edge noise spectroscopy of a magnetic tunnel junction
• Spin Berry curvature of the Haldane model
• Spontaneous ferromagnetism and finite surface energy gap in the topological insulator Bi${}_2$Se${}_3$ from surface Bi$_\rm{Se}$ antisite defects
• Exchange and collective behavior of magnetic impurities in a disordered helical metal
• Negative-U Superconductivity on the Surface of Topological Insulators
• Introducing antiferromagnetic ordering on the surface states of Bi2Se3 topological insulator by Europium doping
• Spin-polarized scanning tunneling microscopy measurement scheme for determining the quantum geometric tensor
• Tunable magnetic anisotropy from higher-harmonics exchange scattering on the surface of a topological insulator