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Cited by 164

The DOI matches its Crossref record; 5 of the 5 references it cites were found in a registry or an index.

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

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Liang, Tian, Gibson, Quinn, Xiong, Jun, Hirschberger, Max, Koduvayur, Sunanda P., Cava, R.J., Ong, N.P.·2013·Nature Communications
DOI 10.1038/ncomms3696
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Abstract

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 states displays features specific to the Dirac spectrum. By relating the carrier density to the peaks in the quantum oscillations, we show that the first (N=0) Landau level is non-degenerate. This finding provides robust evidence that the bulk states are indeed massive Dirac states. In the lowest Landau level, Sxx displays a striking linear increase versus magnetic field characteristic of massive Dirac fermions. In addition, the Nernst signal displays a sign anomaly in the gap-inverted phase at low temperatures. Topological surface states in lead-doped tin selenide are assumed to arise from massive Dirac states in the bulk, but this has not been demonstrated to date. Using thermoelectric transport measurements, Liang et al.now close this gap, and further show a sign anomaly in the Nernst signal due to band inversion.

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Citations

Cites

Research works printed but not linked: 24

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Metadata

Authors
Liang, T., Gibson, Q., Xiong, J., Hirschberger, M., Koduvayur, S. P., Cava, R. J., & Ong, N. P.
Venue
Nature Communications
Publisher
Springer Science and Business Media LLC
Published
2013-11-01
Volume
4
Issue
1
Pages
2696-2696
ISSN
2041-1723 (ISSN-L)
DOI
10.1038/ncomms3696
OpenAlex
W2066106203
Cited by
164
References
5
FWCI
6.00
Type
journal article
Language
en
Open access
bronze
Licence

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