Quasiparticle Interference on the Surface of the Topological Insulator Bi$_2$Te$_3$

Details Quasiparticle Interference on the Surface of the Topological Insulator Bi$_2$Te$_3$ Quasiparticle Interference on the Surface of the Topological Insulator Bi$_2$Te$_3$

2009-10-09

arxiv.org/abs/0910.1668v4

Phys. Rev. B 80, 245439 (2009)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

5 pages, 2 figures, Some typos are corrected

Scientific paper

10.1103/PhysRevB.80.245439

The quasiparticle interference of the spectroscopic imaging scanning tunneling microscopy has been investigated for the surface states of the large gap topological insulator Bi$_2$Te$_3$ through the T-matrix formalism. Both the scalar potential scattering and the spin-orbit scattering on the warped hexagonal isoenergy contour are considered. While backscatterings are forbidden by time-reversal symmetry, other scatterings are allowed and exhibit strong dependence on the spin configurations of the eigenfunctions at k points over the isoenergy contour. The characteristic scattering wavevectors found in our analysis agree well with recent experiment results.

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