Thermodynamic signatures for the existence of Dirac electrons in ZrTe5

Abstract

We combine transport, magnetization, and torque magnetometry measurements to investigate the electronic structure of ZrTe5 and its evolution with temperature. At fields beyond the quantum limit, we observe a magnetization reversal from paramagnetic to diamagnetic response, which is characteristic of a Dirac semi-metal. We also observe a strong non-linearity in the magnetization that suggests the presence of additional low-lying carriers from other low-energy bands. Finally, we observe a striking sensitivity of the magnetic reversal to temperature that is not readily explained by simple band-structure models, but may be connected to a temperature dependent Lifshitz transition proposed to exist in this material.

arXiv comment5 pages, 4 figures

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• Quantum oscillations and Berry's phase in topological insulator surface states with broken particle-hole symmetry
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• Lifshitz transition mediated electronic transport anomaly in bulk ZrTe5
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• Unraveling the topology of ZrTe${}_5$ by changing temperature
• Manipulation of Dirac band curvature and momentum-dependent g-factor in a kagome magnet YMn6Sn6
• Phonon softening near topological phase transitions
• Dark Matter Direct Detection in Materials with Spin-Orbit Coupling
• Giant orbital diamagnetism of three-dimensional Dirac electrons in Sr${}_3$PbO antiperovskite
• Prediction of Tunable Spin-Orbit Gapped Materials for Dark Matter Detection
• Optical conductivity and resistivity in a four-band model for ZrTe${}_5$ from ab-initio calculations
• Crossover behavior in the magnetoresistance of thin flakes of the topological material ZrTe5
• On the effects of strain, defects, and interactions on the topological properties of HfTe5
• Engineering a pure Dirac regime in ZrTe${}_5$
• Turning ZrTe5 into semiconductor through atomic intercalation
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• Quasi-Dirac points in electron-energy spectra of crystals
• Nodal-line driven anomalous susceptibility in ZrSiS