Quantum Interference in Macroscopic Crystals of Nonmetallic Bi 2 Se 3
Open accessAbstract
Photoemission experiments have shown that Bi2Se3 is a topological insulator. By controlled doping, we have obtained crystals of Bi2Se3 with nonmetallic conduction. At low temperatures, we uncover a novel type of magnetofingerprint signal which involves the spin degrees of freedom. Given the mm-sized crystals, the observed amplitude is 200-500x larger than expected from universal conductance fluctuations. The results point to very long phase-breaking lengths in an unusual conductance channel in these nonmetallic samples. We discuss the nature of the in-gap conducting states and their relation to the topological surface states.
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Cu acts as an ambipolar dopant in Bi2Se3.
“it was concluded that Cu acts as an ambipolar dopant.”
The carrier concentration of Cu0.12Bi2Se3 is one order of magnitude higher than native Bi2Se3 and two orders of magnitude higher than Ca-doped Bi2Se3.
“This carrier concentration is one order of magnitude higher than is found in native Bi2 Se3 24,25 , and two orders of magnitude higher than is found for crystals with chemical potentials tuned by Ca doping 28,29 .”
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Cites
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Observation of a large-gap topological-insulator class with a single Dirac cone on the surface
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Self-citationChen, Y. L., Analytis, J. G., Chu, J.-H., Liu, Z. K., Mo, S.-K., Qi, X. L., Zhang, H. J., Lu, D. H., Dai, X., Fang, Z., et al. (2009) · Science · doi:10.1126/science.1173034 · Cited by 3,585 · see citing works
A topological Dirac insulator in a quantum spin Hall phase
Hsieh, D., Qian, D., Wray, L., Xia, Y., Hor, Y. S., Cava, R. J., & Hasan, M. Z. (2008) · Nature · doi:10.1038/nature06843 · Cited by 3,523 · see citing works
Self-citationHor, Y. S., Richardella, A., Roushan, P., Xia, Y., Checkelsky, J. G., Yazdani, A., Hasan, M. Z., Ong, N. P., & Cava, R. J. (2009) · Physical Review B · doi:10.1103/physrevb.79.195208 · Cited by 647 · see citing works
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<i>Colloquium</i> : Topological insulators
Hasan, M. Z., & Kane, C. L. (2010) · Reviews of Modern Physics · doi:10.1103/revmodphys.82.3045 · Cited by 19,930 · see citing works
Topological insulators and superconductors
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Topological Insulator Materials
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Hor, Y. S., Williams, A. J., Checkelsky, J. G., Roushan, P., Seo, J., Xu, Q., Zandbergen, H. W., Yazdani, A., Ong, N. P., & Cava, R. J. (2010) · Physical Review Letters · doi:10.1103/physrevlett.104.057001 · Cited by 1,028 · see citing works
Self-citationAharonov-Bohm oscillations in disordered topological insulator nanowires.
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- Authors
- Checkelsky, J. G., Hor, Y. S., Liu, M.-H., Qu, D.-X., Cava, R. J., & Ong, N. P.
- Affiliations
- Princeton University (US)
- Venue
- Physical Review Letters
- Publisher
- American Physical Society (APS)
- Published
- 2009-12-11
- Volume
- 103
- Issue
- 24
- Pages
- 246601-246601
- ISSN
- 0031-9007 (ISSN-L)
- 1079-7114
- OpenAlex
- W1608552205
- Cited by
- 381
- References
- 5
- Citations by year
- 2026: 10 · 2025: 6 · 2024: 12 · 2023: 18 · 2022: 14 · 2021: 12 · 2020: 15 · 2019: 11 · 2018: 21 · 2017: 33 · 2016: 23 · 2015: 24 · 2014: 31 · 2013: 36 · 2012: 45
- FWCI
- 21.34
- Type
- journal article
- Language
- en
- Open access
- green
- arxiv.org
- Locations
- Physical Review Letters (publishedVersion)
- PubMed (publishedVersion)
- arXiv (Cornell University) (submittedVersion)
- arXiv (Cornell University)
- Topics
- Physical Sciences › Physics and Astronomy › Atomic and Molecular Physics, and Optics › Topological Materials and Phenomena
- Physical Sciences › Physics and Astronomy › Atomic and Molecular Physics, and Optics › Quantum and electron transport phenomena
- Physical Sciences › Physics and Astronomy › Atomic and Molecular Physics, and Optics › Surface and Thin Film Phenomena
- Keywords
- Bi2Se3, topological insulators, quantum interference, spin degrees of freedom, universal conductance fluctuations, topological surface states, photoemission
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