Dirac electron behavior and NMR evidence for topological band inversion in ZrTe5

Abstract

We report ${}^{125}$Te NMR measurements of the topological quantum material ZrTe${}_5$. Spin-lattice relaxation results, well-explained by a theoretical model of Dirac electron systems, reveal that the topological characteristic of ZrTe${}_5$ is $T$-dependent, changing from weak topological insulator to strong topological insulator as temperature increases. Electronic structure calculations confirm this ordering, the reverse of what has been proposed. NMR results demonstrate a gapless Dirac semimetal state occurring at a Lifshitz transition temperature, $T_c=85$ K in our crystals. We demonstrate that the changes in NMR shift at $T_c$ also provide direct evidence of band inversion when the topological phase transition occurs.

arXiv comment5 pages, 4 figures

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Cited by in corpus (16)

• Unraveling the Topological Phase of ZrTe${}_5$ via Magneto-infrared Spectroscopy
• Anomalous Hall effect at the Lifshitz transition in ZrTe5
• Temperature dependence of the energy band gap in ZrTe${}_5$: implications for the topological phase
• Gap-opening transition in Dirac semimetal ZrTe${}_5$
• Topological nodal line in ZrTe${}_2$ demonstrated by nuclear magnetic resonance
• Gate-tunable multiband transport in ZrTe5 thin devices
• Revealing temperature evolution of the Dirac band in ZrTe${}_5$ via magneto-infrared spectroscopy
• Optical conductivity and resistivity in a four-band model for ZrTe${}_5$ from ab-initio calculations
• Revealing the band structure of ZrTe${}_5$ using Multicarrier Transport
• NMR determination of Van Hove singularity and Lifshitz transitions in nodal-line semimetal ZrSiTe
• Local Observations of Orbital Diamagnetism and Excitation in Three-Dimensional Dirac Fermion Systems Bi${}_{1-x}$Sb${}_x$
• ZrOsSi: A $Z_2$ topological metal with a superconducting ground state
• Resistively detected NMR as a probe of the topological nature of conducting edge/surface states
• Site-dependent Local Spin Susceptibility and Low-energy Excitation in a Weyl Semimetal WTe${}_2$
• Experimental nuclear quadrupole resonance and computational study of the structurally refined topological semimetal TaSb${}_2$
• Robust large-gap topological insulator phase in transition-metal chalcogenide ZrTe${}_4$Se