Raman spectroscopy of few-quintuple layer topological insulator Bi2Se3 nanoplatelets.

  title={Raman spectroscopy of few-quintuple layer topological insulator Bi2Se3 nanoplatelets.},
  author={Jun Zhang and Zeping Peng and Ajay Soni and Yanyuan Zhao and Yi Xiong and Bo Peng and Jianbo Wang and Mildred S. Dresselhaus and Qihua Xiong},
  journal={Nano letters},
  volume={11 6},
We report on Raman spectroscopy of few quintuple layer topological insulator bismuth selenide (Bi2Se3) nanoplatelets (NPs), synthesized by a polyol method. The as-grown NPs exhibit excellent crystalline quality, hexagonal or truncated trigonal morphology, and uniformly flat surfaces down to a few quintuple layers. Both Stokes and anti-Stokes Raman spectroscopy for the first time resolve all four optical phonon modes from individual NPs down to 4 nm, where the out-of-plane vibrational A(1g)(1… CONTINUE READING
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