# Two-Dimensional Conical Dispersion in ZrTe_{5} Evidenced by Optical Spectroscopy.

@article{Martino2019TwoDimensionalCD,
title={Two-Dimensional Conical Dispersion in ZrTe\_\{5\} Evidenced by Optical Spectroscopy.},
author={Edoardo Martino and Iris Crassee and Gaku Eguchi and David Santos-Cottin and Ruidan Zhong and Genda Gu and Helmuth Berger and Zoran Rukelj and Milan Orlita and Christopher C. Homes and Ana Akrap},
journal={Physical review letters},
year={2019},
volume={122 21},
pages={
217402
}
}
• E. Martino, +8 authors A. Akrap
• Published 1 May 2019
• Materials Science, Physics, Medicine
• Physical review letters
Zirconium pentatelluride was recently reported to be a 3D Dirac semimetal, with a single conical band, located at the center of the Brillouin zone. The cone's lack of protection by the lattice symmetry immediately sparked vast discussions about the size and topological or trivial nature of a possible gap opening. Here, we report on a combined optical and transport study of ZrTe_{5}, which reveals an alternative view of electronic bands in this material. We conclude that the dispersion is… Expand
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#### References

SHOWING 1-10 OF 89 REFERENCES
Optical spectroscopy study of the three-dimensional Dirac semimetal ZrTe 5
Three-dimensional (3D) topological Dirac materials have been under intensive study recently. The layered compound ZrTe5 has been suggested to be one such material as a result of transport andExpand
Evidence for a Strong Topological Insulator Phase in ZrTe_{5}.
A comprehensive experimental and theoretical study of both electronic and structural properties of ZrTe_{5}, revealing that the bulk material is a strong topological insulator (STI) by means of angle-resolved photoelectron spectroscopy. Expand
Landau-level spectroscopy of massive Dirac fermions in single-crystalline ZrTe 5 thin flakes
We report infrared magnetospectroscopy studies on thin crystals of an emerging Dirac material ${\mathrm{ZrTe}}_{5}$ near the intrinsic limit. The observed structure of the Landau-level transitionsExpand
Nature and topology of the low-energy states in ZrTe 5
The transport properties of zirconium pentatelluride ZrTe${}_{5}$, where the sign of carriers changes with temperature, have so far eluded a clear understanding. In this work, the authors investigateExpand
Temperature-Driven Topological Phase Transition and Intermediate Dirac Semimetal Phase in ZrTe_{5}.
It is found that the energy gap closes around T_{p}, where the optical response exhibits characteristic signatures of a Dirac semimetal state, i.e., a linear frequency-dependent optical conductivity extrapolating to the origin (after subtracting a weak Drude response). Expand
Optical and transport properties in three-dimensional Dirac and Weyl semimetals
• Physics
• 2016
Within a Kubo formalism, we study dc transport and ac optical properties of 3D Dirac and Weyl semimetals. Emphasis is placed on the approach to charge neutrality and on the differences between DiracExpand
Band structure of ZrTe$_5$ measured by high-momentum-resolution photoemission spectroscopy
We have performed a systematic high-momentum-resolution photoemission study on ZrTe$_5$ using $6$ eV photon energy. We have measured the band structure near the $\Gamma$ point, and quantified the gapExpand
Ultrafast Optical Control of the Electronic Properties of ZrTe₅.
It is proved the possibility to control, at the ultrashort time scale, both the binding energy and the quasiparticle lifetime of the valence band of ZrTe(5), paving the way for optically controlling the thermoelectrics and magnetoelectric transport properties of ZRTe( 5. Expand
Spectroscopic evidence for bulk-band inversion and three-dimensional massive Dirac fermions in ZrTe5
Spectroscopic evidence for the TI state in ZrTe5 is offered and the reemergence of the intra-LL transitions at magnetic fields higher than 17 T reveals the energy cross between the two zeroth LLs, which reflects the inversion between the bulk conduction and valence bands. Expand
Magnetoinfrared Spectroscopy of Landau Levels and Zeeman Splitting of Three-Dimensional Massless Dirac Fermions in ZrTe(5).
The splitting of the Landau levels provides direct, bulk spectroscopic evidence that a relatively weak magnetic field can produce a sizable Zeeman effect on the 3D Dirac fermions, which lifts the spin degeneracy of Landau Levels. Expand