Journal article
Multi-band magnetotransport in exfoliated thin films of CuxBi2Se3
- Abstract:
- We report magnetotransport studies in thin (<100 nm) exfoliated films of CuxBi2Se3 and we detect an unusual electronic transition at low temperatures. Bulk crystals show weak superconductivity with Tc ∼ 3.5 K and a possible electronic phase transition around 200K. Following exfoliation, superconductivity is supressed and a strongly temperature dependent multi-band conductivity is observed for T < 30K. This transition between competing conducting channels may be enhanced due to the presence of electronic ordering, and could be affected by the presence of an effective internal stress due to Cu intercalation. By fitting to the weak antilocalisation conductivity correction at low magnetic fields we confirm that the low temperature regime maintains a quantum phase coherence length Lφ > 100 nm indicating the presence of topologically protected surface states.
- Publication status:
- Published
- Peer review status:
- Peer reviewed
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(Preview, Accepted manuscript, pdf, 1.0MB, Terms of use)
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- Publisher copy:
- 10.1088/1361-648X/aab193
Authors
- Publisher:
- IOP Publishing
- Journal:
- Journal of Physics: Condensed Matter More from this journal
- Volume:
- 30
- Issue:
- 15
- Article number:
- 155302
- Publication date:
- 2018-03-16
- Acceptance date:
- 2018-02-22
- DOI:
- EISSN:
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1361-648X
- ISSN:
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0953-8984
- Keywords:
- Pubs id:
-
pubs:827434
- UUID:
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uuid:e380e57e-488e-4d64-9691-ecc5dc3e23de
- Local pid:
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pubs:827434
- Source identifiers:
-
827434
- Deposit date:
-
2018-03-02
Terms of use
- Copyright holder:
- IOP Publishing Ltd
- Copyright date:
- 2018
- Notes:
- Copyright © 2018 IOP Publishing Ltd. This is the accepted manuscript version of the article. The final version is available online from IOP Publishing at: https://doi.org/10.1088/1361-648X/aab193
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