Nonlinear transport due to magnetic-field-induced flat bands in the nodal-line semimetal ZrTe5

Abstract

The Dirac material ZrTe${}_5$ at very low carrier density was recently found to be a nodal-line semimetal, where ultra-flat bands are expected to emerge in magnetic fields parallel to the nodal-line plane. Here we report that in very low carrier-density samples of ZrTe${}_5$, when the current and the magnetic field are both along the crystallographic $a$ axis, the current-voltage characteristics presents a pronounced nonlinearity which tends to saturate in the ultra quantum limit. The magnetic-field dependence of the nonlinear coefficient is well explained by the Boltzmann theory for flat-band transport, and we argue that this nonlinear transport is likely due to the combined effect of flat bands and charge puddles, the latter appear due to very low carrier densities.

arXiv commentFinal version to appear in PRL, 27 pages total; 6 pages of main text with 5 figures, 21 pages of supplemental information with 11 figures

References in corpus (28)

• Negative magnetoresistance without well-defined chirality in the Weyl semimetal TaP
• Observation of the chiral magnetic effect in ZrTe5
• Graphene Bilayers with a Twist
• Topological nodal line semimetals
• Topological Semimetals
• Topological nodal-line fermions in ZrSiSe and ZrSiTe
• Three-dimensional quantum Hall effect and metal-insulator transition in ZrTe5
• Transition-Metal Pentatelluride ZrTe${}_5$ and HfTe${}_5$: a Paradigm for Large-gap Quantum Spin Hall Insulators
• Discovery of Dirac Node Arcs in PtSn4
• Anomalous Hall Effect in ZrTe5
• Electronic Evidence of Temperature-Induced Lifshitz Transition and Topological Nature in ZrTe5
• Magneto-infrared spectroscopy of Landau levels and Zeeman splitting of three-dimensional massless Dirac Fermions in ZrTe${}_5$
• Experimental tests of the chiral anomaly magnetoresistance in the Dirac-Weyl semimetals Na${}_3$Bi and GdPtBi
• Landau Level Quantization and Almost Flat Modes in Three-dimensional Semi-metals with Nodal Ring Spectra
• Review of experiments on the chiral anomaly in Dirac-Weyl semimetals
• Temperature-driven Topological Phase Transition and Intermediate Dirac Semimetal Phase in ZrTe${}_5$
• Why is the bulk resistivity of topological insulators so small?
• Gigantic negative magnetoresistance in a disordered topological insulator
• Discovery of Log-Periodic Oscillations in Ultra-Quantum Topological Materials
• Gigantic magnetochiral anisotropy in the topological semimetal ZrTe5
• Bipolar Conduction is the Origin of the Electronic Transition in Pentatellurides: Metallic vs. Semiconducting Behavior
• Revealing puddles of electrons and holes in compensated topological insulators
• Inter-planar coupling dependent magnetoresistivity in high purity layered metals
• Electron-hole tunneling revealed by quantum oscillations in the nodal-line semimetal HfSiS
• Current-induced breakdown of the quantum anomalous Hall effect
• Dirac Polarons and Resistivity Anomaly in ZrTe5 and HfTe5
• Quantum oscillations probe the Fermi surface topology of the nodal-line semimetal CaAgAs
• Thermodynamically Induced Transport Anomaly in Dilute Metals ZrTe${}_5$ and HfTe${}_5$

Cited by in corpus (5)

• Dispersive Drumhead States in Nodal-Line Semimetal Junctions
• Interband contributions to nonlinear transport in semiconductor nanostructures
• Rashba-splitting-induced topological flat band detected by anomalous resistance oscillations beyond the quantum limit in ZrTe${}_5$
• Dissipationless transport signature of topological nodal lines
• Surface magnon spectra of nodal loop semimetals