DOI: 10.1126/science.1189924. Massive Dirac Fermion on the Surface of a Magnetically Doped Topological Insulator

Massive Dirac Fermion on the Surface of a Magnetically Doped Topological Insulator

10.1126/science.1189924

Crossref journal-article

American Association for the Advancement of Science (AAAS)

Science (221)

Abstract

Opening a Surface Gap 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, Chen et al. (p. 659 ; see the Perspective by Franz ) doped the three-dimensional topological insulator Bi 2 Se 3 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.

Bibliography

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. (2010). Massive Dirac Fermion on the Surface of a Magnetically Doped Topological Insulator. Science, 329(5992), 659â662.

Authors 16

Y. L. Chen (first)
J.-H. Chu (additional)
J. G. Analytis (additional)
Z. K. Liu (additional)
K. Igarashi (additional)
H.-H. Kuo (additional)
X. L. Qi (additional)
S. K. Mo (additional)
R. G. Moore (additional)
D. H. Lu (additional)
M. Hashimoto (additional)
T. Sasagawa (additional)
S. C. Zhang (additional)
I. R. Fisher (additional)
Z. Hussain (additional)
Z. X. Shen (additional)

References 26 Referenced 1,041

Dates

Type	When
Created	15 years ago (Aug. 5, 2010, 2:58 p.m.)
Deposited	1 year, 7 months ago (Jan. 10, 2024, 2:57 a.m.)
Indexed	8 hours, 26 minutes ago (Aug. 27, 2025, 11:39 a.m.)
Issued	15 years ago (Aug. 6, 2010)
Published	15 years ago (Aug. 6, 2010)
Published Print	15 years ago (Aug. 6, 2010)

Funders 0

None

BibTeX

@article{Chen_2010, title={Massive Dirac Fermion on the Surface of a Magnetically Doped Topological Insulator}, volume={329}, ISSN={1095-9203}, url={http://dx.doi.org/10.1126/science.1189924}, DOI={10.1126/science.1189924}, number={5992}, journal={Science}, publisher={American Association for the Advancement of Science (AAAS)}, author={Chen, Y. L. and Chu, J.-H. and Analytis, J. G. and Liu, Z. K. and Igarashi, K. and Kuo, H.-H. and Qi, X. L. and Mo, S. K. and Moore, R. G. and Lu, D. H. and Hashimoto, M. and Sasagawa, T. and Zhang, S. C. and Fisher, I. R. and Hussain, Z. and Shen, Z. X.}, year={2010}, month=aug, pages={659–662} }

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