Multiple Fermi Surfaces in Superconducting Nb-Doped Bi2Se3Physical Review B - Condensed Matter and Materials Physics
AbstractTopological insulator Bi2Se3 has shown a number of interesting physical properties. Doping Bi2Se3 with copper or strontium has been demonstrated to make the material superconducting and potentially even a topological superconductor. The recent discovery of superconducting niobium-doped Bi2Se3 reveals an exciting new physical phenomenon, the coexistence of superconductivity and magnetic ordering, as well as signatures of an odd-parity p-wave superconducting order. To understand this new phenomenon, a detailed knowledge of the electronic structure is needed. We present an observation of quantum oscillations in the magnetization (the de Haas-van Alphen effect) of Nb-doped Bi2Se3. In the fully superconducting crystal, two distinct orbits are observed, in sharp contrast to Bi2Se3, Cu-doped Bi2Se3, and Sr-doped Bi2Se3. The multiple frequencies observed in our quantum oscillations, combined with our electrical transport studies, indicate the multi-orbit nature of the electronic state of Nb-doped Bi2Se3.
Research Center/Lab(s)Center for High Performance Computing Research
Document TypeArticle - Journal
Document VersionFinal Version
Rights© 2016 American Physical Society (APS), All rights reserved.
Citation InformationB. J. Lawson, Paul Corbae, Gang Li, Fan Yu, et al.. "Multiple Fermi Surfaces in Superconducting Nb-Doped Bi2Se3" Physical Review B - Condensed Matter and Materials Physics Vol. 94 Iss. 4 (2016) ISSN: 1098-0121
Available at: http://works.bepress.com/julia-medvedeva/42/