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Structural Properties of Bi2Te3 and Bi2Se3 Topological Insulators Grown by Molecular Beam Epitaxy on GaAs(001) Substrates



X. Liu, D. J. Smith, J. Fan, Y.-H. Zhang, H. Cao, Y. P. Chen, J. Leiner, Brian Kirby, M. Dobrowolska, J. K. Furdyna


Thin films of Bi2Te3 and Bi2Se3 have been grown on deoxidized GaAs(100) substrates using molecular beam epitaxy. Cross-sectional transmission electron microscopy established the highly parallel nature of the Bi-Te(Se)-Bi-Te(Se)-Bi quintuple layers despite the slightly wavy GaAs substrate and the different crystal symmetries of the two materials. Raman mapping confirmed the presence of the strong characteristic peaks reported previously for these materials in bulk form. The overall quality of these films emphasizes the potential for future applications combining topological insulators with ferromagnetic semiconductors.
Applied Physics Letters


topological insulators, magnetic semiconductors


Liu, X. , Smith, D. , Fan, J. , Zhang, Y. , Cao, H. , Chen, Y. , Leiner, J. , Kirby, B. , Dobrowolska, M. and Furdyna, J. (2011), Structural Properties of Bi<sub>2</sub>Te<sub>3</sub> and Bi<sub>2</sub>Se<sub>3</sub> Topological Insulators Grown by Molecular Beam Epitaxy on GaAs(001) Substrates, Applied Physics Letters, [online], (Accessed March 4, 2024)
Created October 23, 2011, Updated October 12, 2021