Tuning carrier type and density in Bi2Se3 by Ca-doping

Zhiyong Wang; Tao Lin; Peng Wei; Xinfei Liu; Randy Dumas; Kai Liu; Jing Shi

doi:10.1063/1.3473778

Tuning carrier type and density in Bi2Se3 by Ca-doping

Materials Science 2015-05-19 v1

Authors: Zhiyong Wang , Tao Lin , Peng Wei , Xinfei Liu , Randy Dumas , Kai Liu , Jing Shi

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Abstract

The carrier type and density in Bi2Se3 single crystals are systematically tuned by introducing a calcium (Ca) dopant. A carrier density of ~1x1017 cm-3 which corresponds to ~25 meV in the Fermi energy is obtained in both n- and p-type materials. Electrical transport properties show that the insulating behavior is achieved in low carrier density crystals. In addition, both the band gap and reduced effective mass of carriers are determined.

Keywords

doping in semiconductors high-temperature superconductivity

Cite

@article{arxiv.1007.0470,
  title  = {Tuning carrier type and density in Bi2Se3 by Ca-doping},
  author = {Zhiyong Wang and Tao Lin and Peng Wei and Xinfei Liu and Randy Dumas and Kai Liu and Jing Shi},
  journal= {arXiv preprint arXiv:1007.0470},
  year   = {2015}
}

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11 pages

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