Study Of Surface Spin-Polarized Electron Accumulation In Topological Insulators Using Scanning Tunneling Microscopy Article Swipe

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S. Tyagi , Michael Dreyer , David Bowen , Dan Hinkel , Patrick J. Taylor , Adam L. Friedman , Robert Butera , C. Krafft , I.D. Mayergoyz ·

YOU? · · 2019 · Open Access · · DOI: https://doi.org/10.48550/arxiv.1911.00162

The results of scanning tunneling microscopy experiments using iron-coated tungsten tips and current-carrying bismuth selenide ($Bi_2Se_3$) samples are reported. Asymmetry in tunneling currents with respect to the change in the direction of bias currents through $Bi_2Se_3$ samples has been observed. It is argued that this asymmetry is the manifestation of surface spin-polarized electron accumulation caused by the ninety-degree electron spin-momentum locking in the topologically protected surface current mode. It is demonstrated that the manifestation of surface spin-polarized electron accumulation is enhanced by tin doping of $Bi_2Se_3$ samples. Furthermore, the appearance of spin-dependent density of states in current carrying $Bi_2Se_3$ samples has also been observed.

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Condensed Matter Physics

Scanning Electron Microscope

Concepts

Scanning tunneling microscope Condensed matter physics Topological insulator Spin (aerodynamics) Electron Asymmetry Bismuth Materials science Scanning electron microscope Scanning tunneling spectroscopy Surface states Tungsten Physics Surface (topology) Optics Quantum mechanics Thermodynamics Mathematics Metallurgy Geometry

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Type: preprint
Language: en
Landing Page: http://arxiv.org/abs/1911.00162
PDF: https://arxiv.org/pdf/1911.00162
OA Status: green
Related Works: 10
OpenAlex ID: https://openalex.org/W2986998109

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DOI: https://doi.org/10.48550/arxiv.1911.00162

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Title: Study Of Surface Spin-Polarized Electron Accumulation In Topological Insulators Using Scanning Tunneling Microscopy

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Type: preprint

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Language: en

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Publication year: 2019

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Publication date: 2019-11-01

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Authors: S. Tyagi, Michael Dreyer, David Bowen, Dan Hinkel, Patrick J. Taylor, Adam L. Friedman, Robert Butera, C. Krafft, I.D. Mayergoyz

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Landing page: https://arxiv.org/abs/1911.00162

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PDF URL: https://arxiv.org/pdf/1911.00162

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Concepts: Scanning tunneling microscope, Condensed matter physics, Topological insulator, Spin (aerodynamics), Electron, Asymmetry, Bismuth, Materials science, Scanning electron microscope, Scanning tunneling spectroscopy, Surface states, Tungsten, Physics, Surface (topology), Optics, Quantum mechanics, Thermodynamics, Mathematics, Metallurgy, Geometry

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