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Intrinsic conduction through topological surface states of insulating Bi <sub>2</sub> Te <sub>3</sub> epitaxial thin films
Topological insulators represent a novel state of matter with surface charge carriers having a massless Dirac dispersion and locked helical spin polarization. Many exciting experiments have been proposed by theory, yet their execution has been hampered by the extrinsic conductivity associated with the unavoidable presence of defects in Bi2Te3 and …