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Transport evidence for the three-dimensional Dirac semimetal phase inZrTe5

Open access
Zheng, Guolin, Lu, Jianwei, Zhu, Xiangde, Ning, Wei, Han, Yuyan, Zhang, Hongwei, Zhang, Jinglei, Xi, Chuanying, Yang, Jiyong, Du, Haifeng, Yang, Kun, Zhang, Yuheng, Tian, Mingliang·2016·Physical Review B

Abstract

Topological Dirac semimetal is a newly discovered class of materials which has attracted intense attention. This material can be viewed as a three-dimensional (3D) analog of graphene and has linear energy dispersion in bulk, leading to a range of exotic transport properties. Here we report direct quantum transport evidence of the 3D Dirac semimetal phase of layered material $\mathrm{ZrT}{\mathrm{e}}_{5}$ by angular-dependent magnetoresistance measurements under high magnetic fields up to 31 T. We observed very clear negative longitudinal magnetoresistance induced by chiral anomaly under the condition of the magnetic field aligned only along the current direction. Pronounced Shubnikov--de Hass (SdH) quantum oscillations in both longitudinal magnetoresistance and transverse Hall resistance were observed, revealing anisotropic light cyclotron masses and high mobility of the system. In particular, a nontrivial \ensuremath{\pi}-Berry phase in the SdH oscillations gives clear evidence for the 3D Dirac semimetal phase. Furthermore, we observed clear Landau level splitting under high magnetic field, suggesting possible splitting of the Dirac point into Weyl points due to broken time-reversal symmetry. Our results indicate that $\mathrm{ZrT}{\mathrm{e}}_{5}$ is an ideal platform to study 3D massless Dirac and Weyl fermions in a layered compound.

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Metadata

Authors
Zheng, G., Lu, J., Zhu, X., Ning, W., Han, Y., Zhang, H., Zhang, J., Xi, C., Yang, J., Du, H., Yang, K., Zhang, Y., & Tian, M.
Venue
Physical Review B
Published
2016-03-09
Volume
93
Issue
11
ISSN
  • 2469-9950 (ISSN-L)
  • 2469-9969
OpenAlex
W2300218866
Cited by
174
References
20
FWCI
10.48
Type
journal article
Language
en
Open access
green

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CoChat. (2026). Citation check: Transport evidence for the three-dimensional Dirac semimetal phase inZrTe5. https://app.cochat.ai/papers/10.1103/physrevb.93.115414
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Zheng, G., Lu, J., Zhu, X., Ning, W., Han, Y., Zhang, H., Zhang, J., Xi, C., Yang, J., Du, H., Yang, K., Zhang, Y., & Tian, M. (2016). Transport evidence for the three-dimensional Dirac semimetal phase inZrTe5. Physical Review B. https://doi.org/10.1103/physrevb.93.115414

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