Massive Dirac Fermion on the Surface of a Magnetically Doped Topological Insulator
Abstract
In addition to a bulk energy gap, topological insulators accommodate a conducting, linearly dispersed Dirac surface state. This state is predicted to become massive if time reversal symmetry is broken, and to become insulating if the Fermi energy is positioned inside both the surface and bulk gaps. We introduced magnetic dopants into the three-dimensional topological insulator dibismuth triselenide (Bi2Se3) to break the time reversal symmetry and further position the Fermi energy inside the gaps by simultaneous magnetic and charge doping. The resulting insulating massive Dirac fermion state, which we observed by angle-resolved photoemission, paves the way for studying a range of topological phenomena relevant to both condensed matter and particle physics.
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Linear MR may be a classical effect due to strong current inhomogeneity or may have a quantum mechanical interpretation.
“Linear MR may be a classical effect due to strong current inhomogeneity (172) or may have a quantum mechanical interpretation (195) (see Section 3.2.8),while sublinear MR may be attributed to the weak antilocalization caused by strong SOC (196).”
From Transport of Topological Semimetals (2019) · cites this paper as [195]
In the quantum limit, MR grows linearly with B.
“In the quantum limit, however, MR grows linearly with B (195).”
From Transport of Topological Semimetals (2019) · cites this paper as [195]
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- Authors
- Chen, Y. L., Chu, J.-H., Analytis, J. G., Liu, Z. K., Igarashi, K., Kuo, H.-H., Qi, X. L., Mo, S. K., Moore, R. G., Lu, D. H., Hashimoto, M., Sasagawa, T., Zhang, S. C., Fisher, I. R., Hussain, Z., & Shen, Z. X.
- Affiliations
- Lawrence Berkeley National Laboratory (US)
- SLAC National Accelerator Laboratory (US)
- Tokyo Institute of Technology (JP)
- Corresponding author
- Shen, Z. X.
- ORCID
- Venue
- Science
- Published
- 2010-08-06
- Volume
- 329
- Issue
- 5992
- Pages
- 659-662
- ISSN
- 0036-8075 (ISSN-L)
- 1095-9203
- OpenAlex
- W2048977235
- Cited by
- 1,185
- References
- 7
- Citations by year
- 2026: 27 · 2025: 37 · 2024: 39 · 2023: 54 · 2022: 77 · 2021: 75 · 2020: 125 · 2019: 79 · 2018: 69 · 2017: 78 · 2016: 103 · 2015: 84 · 2014: 85 · 2013: 101 · 2012: 91
- FWCI
- 43.14
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- Science (publishedVersion)
- PubMed (publishedVersion)
- Topics
- Physical Sciences › Physics and Astronomy › Atomic and Molecular Physics, and Optics › Topological Materials and Phenomena
- Physical Sciences › Physics and Astronomy › Condensed Matter Physics › Advanced Condensed Matter Physics
- Physical Sciences › Materials Science › Materials Chemistry › 2D Materials and Applications
- Keywords
- massive Dirac fermions, topological insulator surface states, magnetic doping, time-reversal symmetry breaking, Bi2Se3, charge doping, angle-resolved photoemission, topological insulators
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