# A natural topological insulator.

@article{Gehring2013ANT, title={A natural topological insulator.}, author={Pascal Gehring and Hadj M. Benia and Y. H. Weng and Robert E. Dinnebier and Christian R. Ast and Marko Burghard and Klaus Kern}, journal={Nano letters}, year={2013}, volume={13 3}, pages={ 1179-84 } }

The earth's crust and outer space are rich sources of technologically relevant materials which have found application in a wide range of fields. Well-established examples are diamond, one of the hardest known materials, or graphite as a suitable precursor of graphene. The ongoing drive to discover novel materials useful for (opto)electronic applications has recently drawn strong attention to topological insulators. Here, we report that Kawazulite, a mineral with the approximate composition Bi2… Expand

#### Topics from this paper

#### 37 Citations

Dimensional crossover in the quantum transport behaviour of the natural topological insulator Aleksite

- Materials Science, Physics
- Scientific reports
- 2015

The size-dependent electronic properties of nanostructures made of the lead-containing mineral Aleksite, a naturally occurring topological insulator, are explored, finding a 1D weak antilocalization effect along with 1D universal conductance fluctuations emerges, which transforms into 2D behavior for larger ribbon widths. Expand

Topological Insulation And Bi2Se3 a Three-Dimensional Topological Insulator

- Mathematics
- 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… Expand

Characterization of individual Bi2Te3 nanowires electrodeposited in etched ion-track membranes for nano-ARPES and electrical transport studies

- Materials Science
- 2017

Promising research ﬁelds associated to solid state physics, such as thermoelectrics and spintronics, have been inﬂuenced by the unique properties of bismuth-based materials. Bismuth telluride… Expand

Prediction of a two-dimensional organic topological insulator.

- Materials Science, Physics
- Nano letters
- 2013

This work identifies a recently experimentally made 2D organometallic framework, consisting of π-conjugated nickel-bis-dithiolene with a chemical formula Ni3C12S12, which exhibits nontrivial topological states in both a Dirac band and a flat band, therefore confirming the existence of OTI. Expand

Spin transport in topological insulator-based nanostructures

- Materials Science
- 2017

With the advent of spintronics, significant research effort is made to realize efficient injection, transport, manipulation, and detection of spin. The material platforms and device architectures… Expand

Topological Insulator Materials

- Materials Science, Physics
- 2013

Topological insulators represent a new quantum state of matter which is characterized by peculiar edge or surface states that show up due to a topological character of the bulk wave functions. This… Expand

Band structure engineering in topological insulator based heterostructures.

- Materials Science, Medicine
- Nano letters
- 2013

Using ab initio calculations, a promising way to control the conducting surface state in topological insulator based heterostructures representing an insulator ultrathin films on the topology insulator substrates is shown. Expand

Scanning Tunneling Spectroscopy Studies of Topological Materials.

- Medicine, Materials Science
- Journal of physics. Condensed matter : an Institute of Physics journal
- 2020

This topical review reports the current investigations by several methods based on STS technique for layered topological material from transition metal dichalcogenide Weyl semimetals (WTe2 and MoTe2) to two-dimensional topological insulators (layered bismuth and silicene). Expand

Topological insulators based on 2D shape-persistent organic ligand complexes.

- Materials Science, Medicine
- Nanoscale
- 2015

This work presents a theoretical study on a new family of two dimensional (2D) nanomaterials based on the coordination of shape persistent organic ligands to heavy transition metal ions such as Pd(2+) and Pt(2+). Expand

Oriented Carbyne - the First Manufacturable Topological Insulator

- Materials Science
- 2014

The qualitative explanation of experimental data published earlier was obtained within a new energetic model of oriented carbyne. The conductivity spectrum and the superinjection effect show Landau… Expand

#### References

SHOWING 1-10 OF 52 REFERENCES

Ambipolar field effect in the ternary topological insulator (Bi(x)Sb(1-x))2Te3 by composition tuning.

- Materials Science, Medicine
- Nature nanotechnology
- 2011

By tuning the ratio of bismuth to antimony, this work is able to reduce the bulk carrier density by over two orders of magnitude, while maintaining the topological insulator properties, and observes a clear ambipolar gating effect in (Bi(x)Sb(1-x))2Te3 nanoplate field-effect transistor devices, similar to that observed in graphene field- effect transistor devices. Expand

Topological surface states and Dirac point tuning in ternary topological insulators

- Physics
- 2012

Using angle-resolved photoemission spectroscopy, we report electronic structure for representative members of ternary topological insulators. We show that several members of this family, such as… Expand

A search model for topological insulators with high-throughput robustness descriptors.

- Physics, Medicine
- Nature materials
- 2012

By defining a reliable and accessible descriptor, which represents the topological robustness or feasibility of the candidate, and by searching the quantum materials repository aflowlib.org, 28 TIs are automatically discovered, including peculiar ternary halides, Cs{Sn,Pb,Ge}{Cl,Br,I}(3), which could have been hardly anticipated without high-throughput means. Expand

Optimizing Bi 2-x Sb x Te 3-y Se y solid solutions to approach the intrinsic topological insulator regime

- Materials Science, Physics
- 2011

To optimize the bulk-insulating behavior in the topological insulator materials having the tetradymite structure, we have synthesized and characterized single-crystal samples of… Expand

Observation of a large-gap topological-insulator class with a single Dirac cone on the surface

- Physics
- 2009

Recent experiments and theories have suggested that strong spin–orbit coupling effects in certain band insulators can give rise to a new phase of quantum matter, the so-called topological insulator,… Expand

Topological Phase Transition and Texture Inversion in a Tunable Topological Insulator

- Physics, Medicine
- Science
- 2011

By directly measuring the topological quantum numbers and invariants, this work reports the observation of a phase transition in a tunable spin-orbit system, BiTl(S1–δSeδ)2, in which the topologically state formation is visualized. Expand

Two-dimensional universal conductance fluctuations and the electron-phonon interaction of surface states in Bi2Te2Se microflakes

- Materials Science, Medicine
- Scientific reports
- 2012

Experimental evidence of the UCFs of the two-dimensional surface state in the bulk insulating Bi2Te2Se microflakes is reported and the electron-phonon interaction is addressed as a secondary source of the surface state dephasing based on the temperature-dependent scaling behavior. Expand

Growth of high-mobility Bi2Te2Se nanoplatelets on hBN sheets by van der Waals epitaxy.

- Materials Science, Physics
- Nano letters
- 2012

The surface state carrier mobility of nanoplatelets on hBN is increased by a factor of about 3 compared to platelets on conventional Si/SiO(x) substrates, which enables the observation of well-developed Shubnikov-de Haas oscillations. Expand

Topological insulators in Bi2Se3, Bi2Te3 and Sb2Te3 with a single Dirac cone on the surface

- Physics
- 2009

Topological insulators are new states of quantum matter in which surface states residing in the bulk insulating gap of such systems are protected by time-reversal symmetry. The study of such states… Expand

Impurity effect on weak antilocalization in the topological insulator Bi2Te3.

- Materials Science, Medicine
- Physical review letters
- 2011

The data demonstrate that the observed WAL is robust against deposition of nonmagnetic Au impurities on the surface of the thin films, but it is quenched by the deposition of magnetic Fe impurities which destroy the π Berry phase of the topological surface states. Expand