# Discovery of a Three-Dimensional Topological Dirac Semimetal, Na3Bi

@article{Liu2014DiscoveryOA, title={Discovery of a Three-Dimensional Topological Dirac Semimetal, Na3Bi}, author={Z K Liu and B In Zhou and Y Zhang and Z. J. Wang and Hongming Weng and Dharmalingam Prabhakaran and S. K. Mo and Z. X. Shen and Zhong Fang and Xi Dai and Zahid Hussain and Y. L. Chen}, journal={Science}, year={2014}, volume={343}, pages={864 - 867} }

A 3D Graphene? Discoveries of materials with exciting electronic properties have propelled condensed matter physics over the past decade. Two of the best-known examples, graphene and topological insulators, have something in common: a linear energy-momentum relationship—the Dirac dispersion—in their two-dimensional (2D) electronic states. Topological insulators also have a more mundane aspect of their electronic structure, characterized by a band gap. Another class of materials, topological…

## 1,415 Citations

A stable three-dimensional topological Dirac semimetal Cd3As2.

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By performing angle-resolved photoemission spectroscopy, a pair of 3D Dirac fermions in Cd3As2 are directly observed, proving that it is a model 3D TDS and by in situ doping it is able to tune its Fermi energy, making it a flexible platform for exploring exotic physical phenomena.

Electric control of topological phase transitions in Dirac semimetal thin films

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This report investigates the possibility to induce and control the topological quantum spin Hall phase in a Dirac semimetal thin film by using a vertical electric field and shows that through the interplay between the quantum confinement effect and the field-induced coupling between sub-bands, the sub-band gap can be tuned and inverted.

Dimensional Crossover and Topological Phase Transition in Dirac Semimetal Na3Bi Films.

- Physics, Materials ScienceACS nano
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It is demonstrated that Dirac gaps emerge in Na3Bi films, providing spectroscopic evidences of dimensional crossover from a 3D semimetal to a 2D topological insulator.

Graphene analogues in bulk : the prediction and observation of 3 D Dirac semimetals

- Physics
- 2013

A large part of the enthusiasm for graphene studies stems from that material’s unusual electronic structure. Undoped graphene is a two-dimensional “Dirac” semimetal, meaning that at low energies and…

Observation of a three-dimensional topological Dirac semimetal phase in high-mobility Cd3As2.

- PhysicsNature communications
- 2014

The discovery of the Dirac-like bulk topological semimetal phase in Cd3As2 opens the door for exploring higher dimensional spin-orbit Dirac physics in a real material.

Evidence of Topological Surface State in Three-Dimensional Dirac Semimetal Cd3As2

- Physics, Materials ScienceScientific reports
- 2014

The electronic structure of Cd3As2 is investigated by angle-resolved photoemission measurements on the crystal surface and detailed band structure calculations and the topological surface state with a linear dispersion approaching the Fermi level is identified for the first time.

Observation of quasi-two-dimensional Dirac fermions in ZrTe5

- Physics
- 2015

Since the discovery of graphene, layered materials have attracted extensive interests owing to their unique electronic and optical characteristics. Among them, Dirac semimetal, one of the most…

Planar Hall effect in the type-II Dirac semimetal
VAl3

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- 2018

The study of electronic properties in topological systems is one of the most fascinating topics in condensed matter physics, which has generated enormous interests in recent times. New materials are…

Elemental Topological Dirac Semimetal: α-Sn on InSb(111).

- PhysicsPhysical review letters
- 2017

Using angle-resolved photoemission spectroscopy, 3D Dirac cones associated with bulk electronic states near the Fermi level are observed in epitaxially grown α-Sn films on InSb(111), the first such TDS system realized in an elemental form.

Observation of Fermi arc surface states in a topological metal

- PhysicsScience
- 2015

The systematic results collectively identify a topological phase in a gapless material and observe a pair of spin-polarized Fermi arc surface states on the surface of the Dirac semimetal Na3Bi at its native chemical potential.

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