Quantum Oscillations in the Topological Superconductor Candidate Cu₀.₂₅Bi₂Se₃

Author

Benjamin J. Lawson
Yew San Hor, Missouri University of Science and TechnologyFollow
Lu Li

Abstract

Quantum oscillations are generally studied to resolve the electronic structure of topological insulators. In Cu_0.25Bi₂Se₃, the prime candidate of topological superconductors, quantum oscillations are still not observed in magnetotransport measurement. However, using torque magnetometry, quantum oscillations (the de Haas-van Alphen effect) were observed in Cu_0.25Bi₂Se₃. The doping of Cu in Bi₂Se₃ increases the carrier density and the effective mass without increasing the scattering rate or decreasing the mean free path. In addition, the Fermi velocity remains the same in Cu_0.25Bi₂Se₃ as that in Bi₂Se₃. Our results imply that the insertion of Cu does not change the band structure and that conduction electrons in Cu doped Bi₂Se₃ sit in the linear Dirac-like band.

Recommended Citation

B. J. Lawson et al., "Quantum Oscillations in the Topological Superconductor Candidate Cu₀.₂₅Bi₂Se₃," Physical Review Letters, vol. 109, no. 22, American Physical Society (APS), Nov 2012.

The definitive version is available at https://doi.org/10.1103/PhysRevLett.109.226406

Department(s)

Physics

Keywords and Phrases

Conduction Electrons; Cu-doped; De Haas-van Alphen Effect; Effective Mass; Fermi Velocities; Magneto-transport Measurement; Mean Free Path; Quantum Oscillations; Scattering Rates; Topological Insulators; Torque Magnetometry; Electronic Structure; Superconducting Materials; Topology; Superconductivity

International Standard Serial Number (ISSN)

0031-9007

Document Type

Article - Journal

Document Version

Final Version

File Type

text

Language(s)

English

Rights

© 2012 American Physical Society (APS), All rights reserved.

Publication Date

01 Nov 2012