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Sondheimer oscillation as a signature of surface Dirac fermions

Year: 2011
Type: article
Abstract: Topological states of matter challenge the paradigm of symmetry breaking, characterized by gapless boundary modes and protected by the topological property of the ground state. Here, we present compelling evidence for the existence of gapless surface Dirac fermions from transport in Bi${}_{2}$Te${}_{3}$. We observe Sondheimer oscillation in magnetoresistance (MR). This oscillation originates from the quantization of motion due to the confinement of electrons within the surface layer. Based on Sondheimer's transport theory, we determine the thickness of the surface state from the oscillation data. In addition, we uncover the topological nature of the surface state, fitting consistently both the nonoscillatory part of MR and the Hall resistance. The side-jump contribution turns out to dominate around 1 T in Hall resistance while the Berry-curvature effect dominates in 3--4 T.
DOI: 10.1103/physrevb.84.125144
Authors: Heon-Jung Kim, Ki-Seok Kim, Mun Dae Kim, S.-J. Lee, J.-W. Han, A. Ohnishi, M. Kitaura, M. Sasaki, A. Kondo, K. Kindo
Institutions: Daegu University, Pohang University of Science and Technology, Asia Pacific Center for Theoretical Physics, Yonsei University, Yamagata University, The Institute for Solid State Physics, The University of Tokyo, The University of Tokyo
Language: English
Open Access status: green
OpenAlex ID: W1928844014
FWCI: 1.264
Cites: 28
Cited by: 17
Related to: 10