Temperature-driven Topological Phase Transition and Intermediate Dirac Semimetal Phase in ZrTe${}_5$

Abstract

We present an infrared spectroscopy study of ZrTe${}_5$, which confirms a recent theoretical proposal that this material exhibits a temperature-driven topological quantum phase transition from a weak to a strong topological insulating state with an intermediate Dirac semimetal state around $T_p\simeq$ 138K. Our study details the temperature evolution of the energy gap in the bulk electronic structure. We found that the energy gap closes around $T_p$ where the optical response exhibits characteristic signatures of a Dirac semimetal state, i.e. a linear frequency-dependent optical conductivity extrapolating to the origin (after subtracting a weak Drude response). This finding allows us to reconcile previous diverging reports about the topological nature of ZrTe${}_5$ in terms of a variation of $T_p$ that depends on the crystal growth condition.

6 pages 3 figures

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• Unraveling the Topological Phase of ZrTe${}_5$ via Magneto-infrared Spectroscopy
• Dirac Polarons and Resistivity Anomaly in ZrTe5 and HfTe5
• Unraveling the topology of ZrTe${}_5$ by changing temperature
• Topological Lifshitz transition and one-dimensional Weyl mode in HfTe5
• Observation of topological nodal-line semimetal in YbMnSb2 through optical spectroscopy
• Topological phase transition and phonon-space Dirac topology surfaces in ZrTe${}_5$
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• Thermodynamically Induced Transport Anomaly in Dilute Metals ZrTe${}_5$ and HfTe${}_5$
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• Zeeman-splitting-induced Topological Nodal Structure and Anomalous Hall Conductivity in ZrTe${}_5$
• Prediction of Tunable Spin-Orbit Gapped Materials for Dark Matter Detection
• Van Hove Singularity Arising from Mexican-Hat-Shaped Inverted Bands in the Topological Insulator Sn-doped Bi${}_{1.1}$Sb${}_{0.9}$Te${}_2$S
• Strong and Tunable Electrical-Anisotropy in Type-II Weyl Semimetal Candidate WP2 with Broken Inversion Symmetry
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• Infrared spectroscopy study of the nodal-line semimetal candidate ZrSiTe under pressure: Hints for pressure-induced phase transitions
• Temperature dependence of the energy band gap in ZrTe${}_5$: implications for the topological phase
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• Topological semimetallic phase in PbO${}_2$ promoted by temperature
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• Robust and tunable Weyl phases by coherent infrared phonons in ZrTe${}_5$
• Quantum Diffusive Magneto-transport in Massive Dirac Materials with Chiral Symmetry Breaking
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• Gapped Dirac semimetal with mixed linear and parabolic dispersions
• Revealing temperature evolution of the Dirac band in ZrTe${}_5$ via magneto-infrared spectroscopy
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• Optical conductivity and resistivity in a four-band model for ZrTe${}_5$ from ab-initio calculations
• Unconventional optical selection rules in ZrTe5 under an in-plane magnetic field
• Magnetic field driven Lifshitz transition and one-dimensional Weyl nodes in three-dimensional pentatellurides
• Pressure Effect on Band Inversion in AECd2As2
• Magneto-optic signatures in the gapped Dirac semimetal with mixed linear and parabolic dispersions of ZrTe5
• Engineering a pure Dirac regime in ZrTe${}_5$
• Extremely low-energy collective modes in a quasi-one-dimensional system
• Crossover behavior in the magnetoresistance of thin flakes of the topological material ZrTe5
• Temperature induced first order electronic topological transition in $\beta$-Ag${}_2$Se
• Temperature-driven modification of surface electronic structure on bismuth, a topological border material
• Tightly-bound and room-temperature-stable excitons in van der Waals degenerate-semiconductor Bi4O4SeCl2 with high charge-carrier density
• Abrupt switching of the anomalous Hall effect by field-rotation in nonmagnetic ZrTe5
• Nonlinear bulk photocurrent probe Z2 topological phase transition
• Fluctuations and Correlations of Local Topological Order Parameters in Disordered Two-dimensional Topological Insulators
• Magneto-transport evidence for strong topological insulator phase in ZrTe5
• Thermal transport properties and some hydrodynamic-like behavior in 3D topological semimetal ZrTe5
• Temperature-Dependent Collective Excitations in a Three-Dimensional Dirac System ZrTe${}_5$
• First-principles studies of fermiology in topological phases of bulk ZrTe${}_5$
• Robust large-gap topological insulator phase in transition-metal chalcogenide ZrTe${}_4$Se
• Optical manipulation of the topological phase in ZrTe5 revealed by time- and angle-resolved photoemission
• Magnetic Brightening and Nanoscale Imaging of Spin-Polarized Helical Edge Modes