Constant-energy plots of the band structure of TlBiTe₂, a possible candidate for 3D topological superconductors.

From the article:

Single Dirac Cone Topological Surface State and Unusual Thermoelectric Property of Compounds from a New Topological Insulator Family
Y. L. Chen, Z. K. Liu, J. G. Analytis, J.-H. Chu, H. J. Zhang, B. H. Yan, S.-K. Mo, R. G. Moore, D. H. Lu, I. R. Fisher, S. C. Zhang, Z. Hussain, and Z.-X. Shen
Phys. Rev. Lett. 105, 266401 (2010)

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