# Probing the wavefunction of the surface states in Bi2Se3 topological insulator: a realistic tight-binding approach

@article{Pertsova2013ProbingTW, title={Probing the wavefunction of the surface states in Bi2Se3 topological insulator: a realistic tight-binding approach}, author={Anna Pertsova and Carlo Maria Canali}, journal={New Journal of Physics}, year={2013}, volume={16} }

We present results of a microscopic tight-binding modeling of Bi 2 ?> Se 3 ?> three-dimensional topological insulator using a sp 3 ?> Slater–Koster Hamiltonian, with parameters calculated from density functional theory. Based on the calculated atomic- and orbital-projections of the wavefunctions associated with valence- and conduction-band states at the center of the Brillouin zone, we propose a real-space description of band inversion for both bulk and a slab of finite thickness. A systematic…

## 28 Citations

### Nonlinear Hybrid Surface-Defect States in Defective Bi2Se3

- PhysicsThe Journal of Physical Chemistry C
- 2022

Surface-states of topological insulators are assumed to be robust against non-magnetic defects in the crystal. However, recent theoretical models and experiments indicate that even non-magnetic…

### Emergent helical edge states in a hybridized three-dimensional topological insulator

- PhysicsNature Communications
- 2022

As the thickness of a three-dimensional (3D) topological insulator (TI) becomes comparable to the penetration depth of surface states, quantum tunneling between surfaces turns their gapless Dirac…

### Topological Insulators: Tight-Binding Models and Surface States

- Physics
- 2019

Topological insulators are relatively recently discovered phases of quantum matter which have exotic electronic properties that have attracted an enormous amount of theoretical and experimental…

### Influence of local symmetry on lattice dynamics coupled to topological surface states

- PhysicsPhysical Review B
- 2023

We investigate coupled electron-lattice dynamics in the topological insulator Bi 2 Te 3 with time-resolved photoemission and time-resolved x-ray diﬀraction. It is well established that coherent…

### Gap-like feature observed in the non-magnetic topological insulators

- PhysicsJournal of physics. Condensed matter : an Institute of Physics journal
- 2019

Non-magnetic gap at the Dirac point of topological insulators remains an open question in the field. Here, we present angle-resolved photoemission spectroscopy experiments performed on Cr-doped…

### Interplay between spin–orbit coupling and crystal-field effect in topological insulators

- PhysicsJournal of physics. Condensed matter : an Institute of Physics journal
- 2015

The crystal-field splitting is shown to compete with the SO coupling, that is, stronger crystal- field splitting leads to weaker SO band shift, and it is shown how both these effects can be controlled by changing the chemical composition, whereas the crystal-fields splitting can be tuned by means of uniaxial strain.

### Closing the Surface Bandgap in Thin Bi2Se3/Graphene Heterostructures.

- Materials ScienceACS nano
- 2019

The findings suggest that the strain and the proximity effect in TI/non-TI heterostructures may be feasible ways to engineer the topological surface states beyond the physical and topological thickness limit.

### Nonlocal sidewall response and deviation from exact quantization of the topological magnetoelectric effect in axion-insulator thin films

- PhysicsPhysical Review B
- 2021

Topological insulator (TI) thin films with surface magnetism are expected to exhibit a quantized anomalous Hall effect (QAHE) when the magnetizations on the top and bottom surfaces are parallel, and…

### Tunable Coupling between Surface States of a Three-Dimensional Topological Insulator in the Quantum Hall Regime.

- PhysicsPhysical review letters
- 2019

This work establishes tunable capacitive coupling between the surface states of a bulk-insulating TI BiSbTeSe_{2} and study the effect of this coupling on QH plateaus and Landau level (LL) fan diagram via dual-gate control.

### Topological Insulation And Bi2Se3 a Three-Dimensional Topological Insulator

- Physics
- 2021

Topological insulators are materials that in bulk mode have band gap such as an ordinary insulator but can protect the conduction mode at the edge or surface, i.e. apart from a simple and insulated…

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