Magnetic Doping and Kondo Effect in Bi2Se3 Nanoribbons

Abstract

A simple surface band structure and a large bulk band gap have allowed Bi2Se3 to become a reference material for the newly discovered three-dimensional topological insulators, which exhibit topologically-protected conducting surface states that reside inside the bulk band gap. Studying topological insulators such as Bi2Se3 in nanostructures is advantageous because of the high surface-to-volume ratio, which enhances effects from the surface states; recently reported Aharonov-Bohm oscillation in topological insulator nanoribbons by some of us is a good example. Theoretically, introducing magnetic impurities in topological insulators is predicted to open a small gap in the surface states by breaking time-reversal symmetry. Here, we present synthesis of magnetically-doped Bi2Se3 nanoribbons by vapor-liquid-solid growth using magnetic metal thin films as catalysts. Although the doping concentration is less than ~ 2%, low-temperature transport measurements of the Fe-doped Bi2Se3 nanoribbon devices show a clear Kondo effect at temperatures below 30 K, confirming the presence of magnetic impurities in the Bi2Se3 nanoribbons. The capability to dope topological insulator nanostructures magnetically opens up exciting opportunities for spintronics.

16 pages, 4 figures

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Cited by in corpus (41)

• Topological insulators and superconductors
• Model Hamiltonian for Topological Insulators
• Few-layer Nanoplates of Bi2Se3 and Bi2Te3 with Highly Tunable Chemical Potential
• Rapid Surface Oxidation as a Source of Surface Degradation Factor for Bi2Se3
• Surface State Transport and Ambipolar Electric Field Effect in Bi2Se3 Nanodevices
• Surface State Magnetization and Chiral Edge States on Topological Insulators
• Magneto-Optical Faraday and Kerr Effects in Topological Insulator Films and in Other Layered Quantized Hall Systems
• Ultra-thin Topological Insulator Bi2Se3 Nanoribbons Exfoliated by Atomic Force Microscopy
• Tailoring Magnetic Doping in the Topological Insulator Bi2Se3
• Stability, Electronic and Magnetic properties of magnetically doped topological insulators Bi2Se3, Bi2Te3 and Sb2Te3
• Magnetic anisotropy effects on quantum impurities in superconducting host
• High pressure transport properties of the topological insulator Bi2Se3
• Catalyst-Free Growth of Millimeter-Long Topological Insulator Bi2Se3 Nanoribbons and the Observation of pi Berry Phase
• Weak antilocalization and electron-electron interaction in coupled multiple-channel transport in a Bi${}_2$Se${}_3$ thin film
• Quantum impurity on the surface of a topological insulator
• Low-velocity anisotropic Dirac fermions on the side surface of topological insulators
• Anderson Impurity in Helical Metal
• Robust gapless surface state and Rashba-splitting bands upon surface deposition of magnetic Cr on Bi${}_2$Se${}_3$
• Energy spectrum and broken spin-surface locking in topological insulator quantum dots
• Probing surface states of topological insulator: Kondo effect and Friedel oscillation under magnetic field
• Kondo screening in a charge-insulating spinon metal
• Synthesis and characterisation of nanomaterials of the topological crystalline insulator SnTe
• Observation of quantum oscillations in FIB fabricated nanowires of topological insulator (Bi2Se3)
• Topological Insulator Thin Films Starting from the Amorphous Phase - Bi${}_2$Se${}_3$ as Example
• FIB synthesis of Bi2Se3 1D nanowires demonstrating the co-existence of Shubnikov-de Haas oscillations and linear magnetoresistance
• Colossal anisotropy in diluted magnetic topological insulators
• Nanomaterials of the topological crystalline insulators, Pb_(1-x)Sn_(x)Te and Pb_(1-x)Sn_(x)Se
• One-dimensional spin texture of Bi(441); Quantum Spin Hall properties without a topological insulator
• Quantum Corrals and Quantum Mirages on the Surface of a Topological Insulator
• Spin-Polarized Quantum Well States on Bi${}_{2-x}$Fe${}_x$Se${}_3$
• Kondo Spin Screening Cloud in Two-dimensional Electron Gas with Spin-orbit Couplings
• Electrically Tunable Wafer-Sized Three-Dimensional Topological Insulator Thin Films Grown by Magnetron Sputtering
• Photoinduced Kondo effect in CeZn${}_3$P${}_3$
• Influence of Helical Spin Structure on the Magnetoresistance of an Ideal Topological Insulator
• Nested Defects on the Boundary of Topological Superconductors
• Gap and spin texture engineering of Dirac topological states at the Cr-Bi${}_2$Se${}_3$ interface
• Theory of multiple magnetic scattering for quasiparticles on a gapless topological insulator surface
• Tunneling behavior of bismuth telluride nanoplates in electrical transport
• A New Era of Quantum Materials Mastery and Quantum Simulators In and Out of Equilibrium
• Structural, Surface Morphology and Magneto-Transport properties of Self Flux Grown Eu Doped Bi2Se3 Single Crystal
• Persistent current-carrying state of charge quasuparticles in $np$-ribbon featuring single Dirac cone