Massive Dirac Fermion on the Surface of a Magnetically Doped Topological Insulator
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- Y. L. Chen
- Stanford Institute for Materials and Energy Sciences, SLAC National Accelerator Laboratory, 2575 Sand Hill Road, Menlo Park, CA 94025, USA.
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- J.-H. Chu
- Stanford Institute for Materials and Energy Sciences, SLAC National Accelerator Laboratory, 2575 Sand Hill Road, Menlo Park, CA 94025, USA.
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- J. G. Analytis
- Stanford Institute for Materials and Energy Sciences, SLAC National Accelerator Laboratory, 2575 Sand Hill Road, Menlo Park, CA 94025, USA.
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- Z. K. Liu
- Stanford Institute for Materials and Energy Sciences, SLAC National Accelerator Laboratory, 2575 Sand Hill Road, Menlo Park, CA 94025, USA.
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- K. Igarashi
- Materials and Structures Laboratory, Tokyo Institute of Technology, Kanagawa 226-8503, Japan.
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- H.-H. Kuo
- Stanford Institute for Materials and Energy Sciences, SLAC National Accelerator Laboratory, 2575 Sand Hill Road, Menlo Park, CA 94025, USA.
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- X. L. Qi
- Stanford Institute for Materials and Energy Sciences, SLAC National Accelerator Laboratory, 2575 Sand Hill Road, Menlo Park, CA 94025, USA.
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- S. K. Mo
- Advanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA.
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- R. G. Moore
- Stanford Institute for Materials and Energy Sciences, SLAC National Accelerator Laboratory, 2575 Sand Hill Road, Menlo Park, CA 94025, USA.
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- D. H. Lu
- Stanford Institute for Materials and Energy Sciences, SLAC National Accelerator Laboratory, 2575 Sand Hill Road, Menlo Park, CA 94025, USA.
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- M. Hashimoto
- Geballe Laboratory for Advanced Materials, Departments of Physics and Applied Physics, Stanford University, Stanford, CA 94305, USA.
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- T. Sasagawa
- Materials and Structures Laboratory, Tokyo Institute of Technology, Kanagawa 226-8503, Japan.
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- S. C. Zhang
- Stanford Institute for Materials and Energy Sciences, SLAC National Accelerator Laboratory, 2575 Sand Hill Road, Menlo Park, CA 94025, USA.
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- I. R. Fisher
- Stanford Institute for Materials and Energy Sciences, SLAC National Accelerator Laboratory, 2575 Sand Hill Road, Menlo Park, CA 94025, USA.
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- Z. Hussain
- Advanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA.
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- Z. X. Shen
- Stanford Institute for Materials and Energy Sciences, SLAC National Accelerator Laboratory, 2575 Sand Hill Road, Menlo Park, CA 94025, USA.
書誌事項
- 公開日
- 2010-08-06
- DOI
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- 10.1126/science.1189924
- 公開者
- American Association for the Advancement of Science (AAAS)
この論文をさがす
説明
<jats:title>Opening a Surface Gap</jats:title> <jats:p> Many properties of topological insulators are a consequence of their so-called gapless surface state, in which electrons are protected from back-scattering, thanks to time-reversal symmetry. Breaking the time-reversal symmetry and opening a surface gap offers prospects for studying phenomena relevant to particle physics, such as axion electrodynamics. To achieve this, <jats:bold> Chen <jats:italic>et al.</jats:italic> </jats:bold> (p. <jats:related-article xmlns:xlink="http://www.w3.org/1999/xlink" ext-link-type="doi" page="659" related-article-type="in-this-issue" vol="329" xlink:href="10.1126/science.1189924">659</jats:related-article> ; see the Perspective by <jats:related-article xmlns:xlink="http://www.w3.org/1999/xlink" ext-link-type="doi" issue="5992" page="639" related-article-type="in-this-issue" vol="329" xlink:href="10.1126/science.1194123">Franz</jats:related-article> ) doped the three-dimensional topological insulator Bi <jats:sub>2</jats:sub> Se <jats:sub>3</jats:sub> with magnetic dopants and observed the opening of a surface gap. Simultaneous doping with charge dopants was used to shift the Fermi energy to the inside of the surface gap, thus achieving an insulating gapped Dirac state. Both the size of the gap and the position of the Fermi energy level were tunable by varying the nature and the density of the dopants. </jats:p>
収録刊行物
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- Science
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Science 329 (5992), 659-662, 2010-08-06
American Association for the Advancement of Science (AAAS)