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Probing the surface states in Bi2Se3 by Shubnikov-de Haas effect
M. Petrushevsky [1] , I. Diamant [1] , E. Lahoud [2] , S. Wiedmann [3] , K. Chashka [2] , A. Kanigel [2] , Y. Dagan [1]
[1] Raymond and Beverly Sackler School of Physics and Astronomy, Tel-Aviv University
[2] Department of Physics, Technion-Israel Institute of Technology
[3] High Field Magnet Laboratory (HFML), Radboud University Nijmegen
Shubnikov-de Haas oscillations are observed in magnetic fields up to 32T in Bi2Se3 flakes with high carrier concentration and low bulk mobility. These oscillations are two dimensional in character and seem to originate from the protected surface states. We extract their carrier concentration, effective mass and Dingle temperature. We discuss the possibility to observe the π Berry phase using this probe. The Fermi momentum obtained from the oscillation frequency is in agreement with ARPES measurements performed on crystals from the same batch.