Naslov
Two-Dimensional Conical Dispersion in ZrTe5 Evidenced by Optical Spectroscopy

Autori
Martino, E. ; Crassee, I. ; Eguchi, G. ; Santos-Cottin, D. ; Zhong, R. D. ; Gu, G. D. ; Berger, H. ; Rukelj, Z. ; Orlita, M. ; Homes, C. C. ; Akrap, Ana

Izvornik
Physical review letters (0031-9007) 122 (2019), 21; 217402, 6

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
Zirconium pentatelluride ; Optical Spectroscopy

Sažetak
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 ZrTe5, which reveals an alternative view of electronic bands in this material. We conclude that the dispersion is approximately linear only in the a-c plane, while remaining relatively flat and parabolic in the third direction (along the b axis). Therefore, the electronic states in ZrTe5 cannot be described using the model of 3D Dirac massless electrons, even when staying at energies well above the band gap 2Δ ¼ 6 meV found in our experiments at low temperatures.

Izvorni jezik
Engleski

Znanstvena područja
Fizika

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