Amphoteric nature of copper impurities in Bi2Se3 crystals
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Copper intercalated between selenium planes acts as a single electron donor, while copper substituting bismuth contributes two holes.
“Copper atoms intercalated between van der Waals-like bonded selenium planes (Cu int ) in the crystal are known to be single electron donors, whereas substitutional defects in which copper replaces bismuth in the lattice (Cu Bi ) contribute two holes to the system, which is similar to the behaviour reported in the impurity-atom study on the Bi 2 Se 3 matrix 25 .”
From Observation of topological order in a superconducting doped topological insulator (2010) · cites this paper as [25]
Bi2Se3 is a layered compound made of weakly van der Waals bonded Se-Bi-Se-Bi-Se five-layer sandwiches, yielding excellent basal plane cleavage and high-quality layered crystals.
“The resulting Se-Bi-Se-Bi-Se five layer sandwich is only weakly van der Waals bonded to the next sandwich, through the outer Se layers, yielding a material with excellent basal plane cleavage and excellent quality layered crystals both in the bulk and in thin films 19-21 .”
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- Authors
- Vaško, A., Tichý, L., Horák, J., & Weissenstein, J.
- ORCID
- Tichý, L.
- Venue
- Applied Physics
- Published
- 1974-12
- Volume
- 5
- Issue
- 3
- Pages
- 217-221
- ISSN
- 0947-8396 (ISSN-L)
- 0340-3793
- 1432-0630
- OpenAlex
- W2015855374
- Cited by
- 77
- References
- 9
- Citations by year
- 2026: 2 · 2025: 2 · 2024: 1 · 2023: 5 · 2022: 3 · 2021: 6 · 2020: 4 · 2019: 4 · 2018: 3 · 2017: 2 · 2016: 4 · 2015: 3 · 2014: 7 · 2013: 3 · 2012: 5
- FWCI
- 0.00
- Type
- journal article
- Language
- en
- Open access
- closed
- Licence
- www.springer.com/tdm (tdm)
- Locations
- Applied Physics A (publishedVersion)
- Topics
- Physical Sciences › Materials Science › Materials Chemistry › Advanced Thermoelectric Materials and Devices
- Physical Sciences › Engineering › Electrical and Electronic Engineering › Chalcogenide Semiconductor Thin Films
- Physical Sciences › Physics and Astronomy › Atomic and Molecular Physics, and Optics › Semiconductor materials and interfaces
- Keywords
- Bi2Se3, copper doping, copper impurities, amphoteric impurities, infrared reflectivity, plasma resonance, Hall constant, effective mass, free carrier concentration, point defects, interstitial copper, donor and acceptor defects
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