Massive Dirac fermion on the surface of a magnetically doped topological insulator.

  title={Massive Dirac fermion on the surface of a magnetically doped topological insulator.},
  author={Yulin Chen and J-H Chu and James G. Analytis and Z. K. Liu and Kozue Igarashi and H-H Kuo and X. L. Qi and S-K. Mo and Rob G. Moore and Donghui Lu and Michio Hashimoto and Takao Sasagawa and Shoucheng Zhang and Ian R Fisher and Zahid Hussain and Z. X. Shen},
  volume={329 5992},
In addition to a bulk energy gap, topological insulators accommodate a conducting, linearly dispersed Dirac surface state. This state is predicted to become massive if time reversal symmetry is broken, and to become insulating if the Fermi energy is positioned inside both the surface and bulk gaps. We introduced magnetic dopants into the three-dimensional topological insulator dibismuth triselenide (Bi2Se3) to break the time reversal symmetry and further position the Fermi energy inside the… CONTINUE READING
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