Observation of dirac node formation and mass acquisition in a topological crystalline insulator

Y. Okada, M. Serbyn, H. Lin, D. Walkup, W. Zhou, C. Dhital, M. Neupane, S. Xu, Y. Wang, R. Sankar, F. Chou, A. Bansil, M. Hasan, S. Wilson, L. Fu, V. Madhavan, Science 341 (2013) 1496–1499.


Journal Article | Published | English
Author
Okada, Yoshinori; Serbyn, MaksymIST Austria ; Lin, Hsin; Walkup, Daniel; Zhou, Wenwen; Dhital, Chetan; Neupane, Madhab; Xu, Suyang; Wang, Yungjui; Sankar, Raman; Chou, Fangcheng; Bansil, Arun
All
Abstract
In topological crystalline insulators (TCIs), topology and crystal symmetry intertwine to create surface states with distinct characteristics. The breaking of crystal symmetry in TCIs is predicted to impart mass to the massless Dirac fermions. Here, we report high-resolution scanning tunneling microscopy studies of a TCI, Pb1-xSnxSe that reveal the coexistence of zero-mass Dirac fermions protected by crystal symmetry with massive Dirac fermions consistent with crystal symmetry breaking. In addition, we show two distinct regimes of the Fermi surface topology separated by a Van-Hove singularity at the Lifshitz transition point. Our work paves the way for engineering the Dirac band gap and realizing interaction-driven topological quantum phenomena in TCIs.
Publishing Year
Date Published
2013-01-01
Journal Title
Science
Volume
341
Issue
6153
Page
1496 - 1499
IST-REx-ID
972

Cite this

Okada Y, Serbyn M, Lin H, et al. Observation of dirac node formation and mass acquisition in a topological crystalline insulator. Science. 2013;341(6153):1496-1499. doi:10.1126/science.1239451
Okada, Y., Serbyn, M., Lin, H., Walkup, D., Zhou, W., Dhital, C., … Madhavan, V. (2013). Observation of dirac node formation and mass acquisition in a topological crystalline insulator. Science, 341(6153), 1496–1499. https://doi.org/10.1126/science.1239451
Okada, Yoshinori, Maksym Serbyn, Hsin Lin, Daniel Walkup, Wenwen Zhou, Chetan Dhital, Madhab Neupane, et al. “Observation of Dirac Node Formation and Mass Acquisition in a Topological Crystalline Insulator.” Science 341, no. 6153 (2013): 1496–99. https://doi.org/10.1126/science.1239451.
Y. Okada et al., “Observation of dirac node formation and mass acquisition in a topological crystalline insulator,” Science, vol. 341, no. 6153, pp. 1496–1499, 2013.
Okada Y, Serbyn M, Lin H, Walkup D, Zhou W, Dhital C, Neupane M, Xu S, Wang Y, Sankar R, Chou F, Bansil A, Hasan M, Wilson S, Fu L, Madhavan V. 2013. Observation of dirac node formation and mass acquisition in a topological crystalline insulator. Science. 341(6153), 1496–1499.
Okada, Yoshinori, et al. “Observation of Dirac Node Formation and Mass Acquisition in a Topological Crystalline Insulator.” Science, vol. 341, no. 6153, American Association for the Advancement of Science, 2013, pp. 1496–99, doi:10.1126/science.1239451.
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