Quantum Oscillations from Nontrivial States in Quasi-Two-Dimensional Dirac Semimetal ZrTe5 Nanowires

Pei Yang; Wei Wang; Xiaoqian Zhang; Kejie Wang; Liang He; Wenqing Liu; Yongbing Xu

doi:10.1038/s41598-019-39144-y

Quantum Oscillations from Nontrivial States in Quasi-Two-Dimensional Dirac Semimetal ZrTe₅ Nanowires

Sci Rep. 2019 Mar 5;9(1):3558. doi: 10.1038/s41598-019-39144-y.

Authors

Pei Yang¹, Wei Wang¹, Xiaoqian Zhang¹, Kejie Wang¹, Liang He², Wenqing Liu³, Yongbing Xu^{4

5}

Affiliations

¹ Jiangsu Provincial Key Laboratory for Nanotechnology, Collaborative Innovation Center of Advanced Microstructures, School of Electronic Science and Engineering, Nanjing University, Nanjing, 210093, P. R. China.
² Jiangsu Provincial Key Laboratory for Nanotechnology, Collaborative Innovation Center of Advanced Microstructures, School of Electronic Science and Engineering, Nanjing University, Nanjing, 210093, P. R. China. heliang@nju.edu.cn.
³ York Nanjing Joint Centre for Spintronics and Nanotechnology, Departments of Electronics, The University of York, York, YO10 5DD, UK.
⁴ Jiangsu Provincial Key Laboratory for Nanotechnology, Collaborative Innovation Center of Advanced Microstructures, School of Electronic Science and Engineering, Nanjing University, Nanjing, 210093, P. R. China. yongbing.xu@york.ac.uk.
⁵ York Nanjing Joint Centre for Spintronics and Nanotechnology, Departments of Electronics, The University of York, York, YO10 5DD, UK. yongbing.xu@york.ac.uk.

Abstract

Recently discovered Dirac semimetal ZrTe₅ bulk crystal, exhibits nontrivial conducting states in each individual layer, holding great potential for novel spintronic applications. Here, to reveal the transport properties of ZrTe₅, we fabricated ZrTe₅ nanowires (NWs) devices, with much larger surface-to-volume ratio than bulk materials. Quantum oscillations induced by the two-dimensional (2D) nontrivial conducting states have been observed from these NWs and a finite Berry phase of ~π is obtained by the analysis of Landau-level fan diagram. More importantly, the absence of the Aharonov-Bohm (A-B) oscillations, along with the SdH oscillations, suggests that the electrons only conduct inside each layer. And the intralayer conducting is suppressed because of the weak connection between adjacent layers. Our results demonstrate that ZrTe₅ NWs can serve as a suitable quasi-2D Dirac semimetal with high mobility (~85000 cm²V^-1s^-1) and large nontrivial conductance contribution (up to 8.68%).

Abstract

Grants and funding