Sandilands, LJ, Reijnders, AA, Kriener, M et al. (4 more authors) (2014) Doping-dependent charge dynamics in CuₓBi₂Se₃. Physical Review B - Condensed Matter and Materials Physics, 90 (9). 094503. ISSN 1098-0121
Abstract
Superconducting CuₓBi₂Se₃ has attracted significant attention as a candidate topological superconductor. Besides inducing superconductivity, the introduction of Cu atoms to this material has also been observed to produce a number of unusual features in DC transport and magnetic susceptibility measurements. To clarify the effect of Cu doping, we have performed a systematic optical spectroscopic study of the electronic structure of CuₓBi₂Se₃ as a function of Cu doping. Our measurements reveal an increase in the conduction band effective mass, while both the free carrier density and lifetime remain relatively constant for Cu content greater than x=0.15. The increased mass naturally explains trends in the superfluid density and residual resistivity as well as hints at the complex nature of Cu doping in Bi₂Se₃.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2014 American Physical Society. Reproduced in accordance with the publisher's self-archiving policy. |
Dates: |
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Institution: | The University of Leeds |
Academic Units: | The University of Leeds > Faculty of Engineering & Physical Sciences (Leeds) > School of Physics and Astronomy (Leeds) > Condensed Matter (Leeds) |
Depositing User: | Symplectic Publications |
Date Deposited: | 15 Jun 2018 15:22 |
Last Modified: | 21 Jun 2018 14:21 |
Status: | Published |
Publisher: | American Physical Society |
Identification Number: | 10.1103/PhysRevB.90.094503 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:130749 |