# STM imaging of a bound state along a step on the surface of the topological insulator Bi 2 Te 3

@article{Alpichshev2011STMIO, title={STM imaging of a bound state along a step on the surface of the topological insulator Bi 2 Te 3}, author={Zhanybek Alpichshev and James G. Analytis and Jiun Haw Chu and Ian R. Fisher and Aharon Kapitulnik}, journal={Physical Review B}, year={2011}, volume={84}, pages={041104} }

Detailed study of the LDOS associated with the surface-state-band near a step-edge of the strong topological-insulator Bi2Te3, reveal a one-dimensional bound state that runs parallel to the stepedge 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. Using the full effective Hamiltonian… Expand

#### 24 Citations

Experimental Observation of Bound States of 2D Dirac Electrons at Surface Steps of the Topological Insulator Bi
2
Se
3

- Physics
- physica status solidi (RRL) – Rapid Research Letters
- 2019

Topologically protected surface states of three-dimensional topological insulators provide a model framework for studying massless Dirac electrons in two dimensions. Usually a step on the surface of… Expand

Electron states scattering off line edges on the surface of topological insulator

- Physics
- 2014

We study the local density of states (LDOS) for electrons scattering off the line edge of an atomic step defect on the surface of a three-dimensional (3D) topological insulator (TI) and the line edge… Expand

Electronic structure for a topological insulator with a smoothly varying step on surface

- Materials Science
- 2014

Abstract We study the penetration depth (PD) of surface state into the bulk, the local density of states (LDOS) and the spin-polarized STM tip tunneling conductance (TG) for a smoothly varying step… Expand

Connection topology of step edge state bands at the surface of a three dimensional topological insulator

- Physics, Materials Science
- 2018

Topological insulators in the Bi$_2$Se$_3$ family manifest helical Dirac surface states that span the topologically ordered bulk band gap. Recent scanning tunneling microscopy measurements have… Expand

Numerical analysis of surface and edge states in slabs, stripes, rods and surface steps of topological insulators.

- Physics, Medicine
- Journal of physics. Condensed matter : an Institute of Physics journal
- 2018

By numerically solving the effective continuous model of a topological insulator with parameters corresponding to the band structure of the topology insulator Bi2Se3, it is argued that the origin of the massive modes is due to the difference in the Dirac point energy of adjacent faces. Expand

Kondo screening by the surface modes of a strong topological insulator

- Physics
- 2013

We consider a magnetic impurity deposited on the surface of a strong topological insulator and interacting with the surface modes by a Kondo exchange interaction. Taking into account the warping of… Expand

Disorder enabled band structure engineering of a topological insulator surface

- Materials Science, Physics
- Nature communications
- 2017

At native densities in the model Bi2X3 (X=Bi, Te) compounds, defect resonance states are predicted to generate a new quantum basis for an emergent electron gas that supports diffusive electrical transport. Expand

Phase Separation of Dirac Electrons in Topological Insulators at the Spatial Limit.

- Physics, Medicine
- Nano letters
- 2017

This work presents unique signatures manifested by the local electronic properties of the topological surface state in Bi2Te3 nanostructures as the spatial limit is approached, and shows a new approach to tune the Dirac point together with reduction of electronic disorder in topological insulator (TI) nanostructure systems. Expand

Diffusion at the surface of topological insulators

- Physics
- 2012

We consider the dc transport properties of topological insulator surface states in the presence of uncorrelated point-like disorder, both in the classical and quantum regimes. The dc conductivity of… Expand

Spin and charge structure of the surface states in topological insulators

- Physics
- 2012

We investigate the spin and charge densities of surface states of the three-dimensional topological insulator Bi${}_{2}$Se${}_{3}$, starting from the continuum description of the material [Zhang et… Expand