Evidence for massive bulk Dirac fermions in Pb₁-xSnxSe from Nernst and thermopower experiments.

@article{Liang2013EvidenceFM,
  title={Evidence for massive bulk Dirac fermions in Pb₁-xSnxSe from Nernst and thermopower experiments.},
  author={Tian Shui Liang and Quinn D. Gibson and Jun Rui Xiong and Max Hirschberger and Sunanda P. Koduvayur and Robert Joseph Cava and Nai Phuan Ong},
  journal={Nature communications},
  year={2013},
  volume={4},
  pages={
          2696
        }
}
Topological surface states protected by mirror symmetry are of interest for spintronic applications. Such states were predicted to exist in the rocksalt IV-VI semiconductors, and several groups have observed the surface states in (Pb,Sn)Te, (Pb,Sn)Se and SnTe using photoemission. An underlying assumption in the theory is that the surface states arise from bulk states describable as massive Dirac states, but this assumption is untested. Here we show that the thermoelectric response of the bulk… CONTINUE READING
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