STM imaging of a bound state along a step on the surface of the topological insulator Bi2Te3

Alpichshev Z, Analytis JG, Chu JH, Fisher IR, Kapitulnik A. 2011. STM imaging of a bound state along a step on the surface of the topological insulator Bi2Te3. Physical Review B - Condensed Matter and Materials Physics. 84(4).


Journal Article | Published | English
Author
Alpichshev, ZhanybekIST Austria ; Analytis, J G; Chu, J H; Fisher, I R; Kapitulnik, A
Abstract
We present a detailed study of the local density of states (LDOS) associated with the surface-state band near a step edge of the strong topological insulator Bi2Te3 and reveal a one-dimensional bound state that runs parallel to the step edge and is bound to it at some characteristic distance. This bound state is clearly observed in the bulk gap region, while it becomes entangled with the oscillations of the warped surface band at high energy, and with the valence-band states near the Dirac point. We obtain excellent fits to theoretical predictions [Alpichshev, 2011] that properly incorporate the three-dimensional nature of the problem to the surface state. Fitting the data at different energies, we can recalculate the LDOS originating from the Dirac band without the contribution of the bulk bands or incoherent tunneling effects.
Publishing Year
Date Published
2011-07-21
Journal Title
Physical Review B - Condensed Matter and Materials Physics
Volume
84
Issue
4
IST-REx-ID
386

Cite this

Alpichshev Z, Analytis JG, Chu JH, Fisher IR, Kapitulnik A. STM imaging of a bound state along a step on the surface of the topological insulator Bi2Te3. Physical Review B - Condensed Matter and Materials Physics. 2011;84(4). doi:10.1103/PhysRevB.84.041104
Alpichshev, Z., Analytis, J. G., Chu, J. H., Fisher, I. R., & Kapitulnik, A. (2011). STM imaging of a bound state along a step on the surface of the topological insulator Bi2Te3. Physical Review B - Condensed Matter and Materials Physics. American Physical Society. https://doi.org/10.1103/PhysRevB.84.041104
Alpichshev, Zhanybek, J G Analytis, J H Chu, I R Fisher, and A Kapitulnik. “STM Imaging of a Bound State along a Step on the Surface of the Topological Insulator Bi2Te3.” Physical Review B - Condensed Matter and Materials Physics. American Physical Society, 2011. https://doi.org/10.1103/PhysRevB.84.041104.
Z. Alpichshev, J. G. Analytis, J. H. Chu, I. R. Fisher, and A. Kapitulnik, “STM imaging of a bound state along a step on the surface of the topological insulator Bi2Te3,” Physical Review B - Condensed Matter and Materials Physics, vol. 84, no. 4. American Physical Society, 2011.
Alpichshev Z, Analytis JG, Chu JH, Fisher IR, Kapitulnik A. 2011. STM imaging of a bound state along a step on the surface of the topological insulator Bi2Te3. Physical Review B - Condensed Matter and Materials Physics. 84(4).
Alpichshev, Zhanybek, et al. “STM Imaging of a Bound State along a Step on the Surface of the Topological Insulator Bi2Te3.” Physical Review B - Condensed Matter and Materials Physics, vol. 84, no. 4, American Physical Society, 2011, doi:10.1103/PhysRevB.84.041104.
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