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

@article{Pertsova2014ProbingTW, 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={2014}, 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…

## 26 Citations

### Non-linear hybrid surface-defect states in defective Bi$_2$Se$_3$

- Physics
- 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…

### Band bending at the surface of Bi2Se3 studied from first principles

- Physics
- 2015

The band bending (BB) effect on the surface of the second-generation topological insulators implies a serious challenge to design transport devices. The BB is triggered by the effective electric…

### Band structure of a three-dimensional topological insulator quantum wire in the presence of a magnetic field

- PhysicsJournal of physics. Condensed matter : an Institute of Physics journal
- 2016

By means of a numerical diagonalization approach, the electronic structure of a three-dimensional topological insulator (3DTI) quantum wire (QW) in the presence of a magnetic field is calculated and indicates that nonchiral edge states emerge because of the confined states at the lateral surfaces.

### 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…

### 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.

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