Bulk versus surface contributions to the Shubnikov-de Haas Effect
ORAL
Abstract
Among the bulk materials that are considered as experimental realizations of topological insulators Bi$_{2}$Se$_{3}$ is of particular interest due to its large bulk band gap and surface states with a single Dirac cone. It has been recently shown that Bi$_{2}$Se$_{3}$ can become superconducting when Cu$^{\, }$intercalation is introduced (Hor, Y. S.; Williams, A. J. et al. \textit{Phys. Rev. Lett. }\textbf{2010}, 104, 057001). We report on transport measurements of cleaved flakes $\sim $1$-$100 $\mu $m thick of Cu intercalated Bi$_{2}$Se$_{2}$. Clear Shubnikov-de Haas oscillations are observed. We study the temperature and angular dependence of these oscillations together with the Hall coefficient at low temperatures for various Cu concentrations. We discuss possible contributions from bulk and the protected surface states to the various transport channels.
*Support from the infrastructure program of the Israeli Ministry of Science and Technology is acknowledged. Part of this work has been supported by EuroMagNET under the EU Contract No. 228043.
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Authors
E. Maniv
Raymond and Beverly Sackler School of Physics and Astronomy, Tel-Aviv University, Israel
M. Petrushevsky
Raymond and Beverly Sackler School of Physics and Astronomy, Tel-Aviv University, Israel
E. Lahoud
Department of Physics, Technion-Israel Institute of Technology, Israel
A. Ron
Raymond and Beverly Sackler School of Physics and Astronomy, Tel-Aviv University, Israel
I. Neder
Raymond and Beverly Sackler School of Physics and Astronomy, Tel-Aviv University, Israel
S. Wiedmann
High Field Magnet Laboratory, Institute for Molecules and Materials, Radboud University Nijmegen, The Netherlands
V.K. Guduru
High Field Magnet Laboratory, Institute for Molecules and Materials, Radboud University Nijmegen, The Netherlands
U. Zeitler
High Field Magnet Laboratory, Institute for Molecules and Materials, Radboud University Nijmegen, The Netherlands
J.C. Maan
High Field Magnet Laboratory, Institute for Molecules and Materials, Radboud University Nijmegen, The Netherlands
K. Chashka
Department of Physics, Technion-Israel Institute of Technology, Israel
A. Kanigel
Department of Physics, Technion-Israel Institute of Technology, Israel
Y. Dagan
Raymond and Beverly Sackler School of Physics and Astronomy, Tel-Aviv University, Israel
