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Fermi level tuning of topological insulator Bi2(SexTe1-x)3 nanoplates

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7 Author(s)
Hao, Guolin ; Hunan Key Laboratory for Micro-Nano Energy Materials and Devices, Xiangtan University, Hunan 411105, People's Republic of China ; Qi, Xiang ; Xue, Lin ; Cai, Canying
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The crystal structures and morphologies of ternary Bi2(SexTe1-x)3 nanoplates have been systematically characterized by employing atomic force microscopy, scanning electron microscopy, high-resolution transmission electron microscopy equipped with the energy dispersive X-ray spectrometer, and the X-ray diffraction. We find that the Bi2(SexTe1-x)3 nanoplates exhibit uniform charge and surface potential distributions. And their Fermi levels can be effectively tuned up to 0.23 eV by varying the selenium/tellurium composition ratios.

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Journal of Applied Physics  (Volume:113 ,  Issue: 2 )