DOAJ Open Access 2024

Signature of pressure-induced topological phase transition in ZrTe5

Zoltán Kovács-Krausz Dániel Nagy Albin Márffy Bogdan Karpiak Zoltán Tajkov +7 lainnya

Abstrak

Abstract The layered van der Waals material ZrTe5 is known as a candidate topological insulator (TI), however its topological phase and the relation with other properties such as an apparent Dirac semimetallic state is still a subject of debate. We employ a semiclassical multicarrier transport (MCT) model to analyze the magnetotransport of ZrTe5 nanodevices at hydrostatic pressures up to 2 GPa. The temperature dependence of the MCT results between 10 and 300 K is assessed in the context of thermal activation, and we obtain the positions of conduction and valence band edges in the vicinity of the chemical potential. We find evidence of the closing and re-opening of the band gap with increasing pressure, which is consistent with a phase transition from weak to strong TI. This matches expectations from ab initio band structure calculations, as well as previous observations that CVT-grown ZrTe5 is a weak TI in ambient conditions.

Topik & Kata Kunci

Materials of engineering and construction. Mechanics of materials Atomic physics. Constitution and properties of matter

Penulis (12)

Zoltán Kovács-Krausz

Dániel Nagy

Albin Márffy

Bogdan Karpiak

Zoltán Tajkov

László Oroszlány

János Koltai

Péter Nemes-Incze

Saroj P. Dash

Péter Makk

Szabolcs Csonka

Endre Tóvári

Format Sitasi

APA MLA BibTeX

Kovács-Krausz, Z., Nagy, D., Márffy, A., Karpiak, B., Tajkov, Z., Oroszlány, L. et al. (2024). Signature of pressure-induced topological phase transition in ZrTe5. https://doi.org/10.1038/s41535-024-00679-7

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Informasi Jurnal

Tahun Terbit: 2024
Sumber Database: DOAJ
DOI: 10.1038/s41535-024-00679-7
Akses: Open Access ✓