Gate-tuned quantum Hall states in Dirac semimetal (Cd1-xZnx)3As2

Abstract

The recent discovery of topological Dirac semimetals (DSM) has provoked intense curiosity not only on Weyl physics in solids, but also on topological phase transitions originating from DSM. One example is controlling the dimensionality to realize two-dimensional quantum phases such as quantum Hall and quantum spin Hall states. For investigating these phases, the Fermi level is a key controlling parameter. From this perspective, we report here the carrier-density control of quantum Hall states realized in thin films of DSM Cd3As2. Chemical doping of Zn combined with electrostatic gating has enabled us to tune the carrier density over a wide range and continuously even across the charge neutrality point. Comprehensive analyses of the gate-tuned quantum transport have revealed Landau level formation from linearly dispersed sub-bands and its contribution to the quantum Hall states. Our achievements pave the way also for investigating the low energy physics near the Dirac points of DSM.

arXiv comment20 pages, 4 figures

References in corpus (32)

• The electronic properties of graphene
• Two-Dimensional Gas of Massless Dirac Fermions in Graphene
• Topological Insulators
• Topological insulators and superconductors
• Experimental Observation of Quantum Hall Effect and Berry's Phase in Graphene
• Quantum Spin Hall Effect and Topological Phase Transition in HgTe Quantum Wells
• Discovery of a Three-dimensional Topological Dirac Semimetal, Na3Bi
• Topological Insulator Materials
• Three Dimensional Dirac Semimetal and Quantum Transports in Cd3As2
• Observation of Electron-Hole Puddles in Graphene Using a Scanning Single Electron Transistor
• Ultrahigh mobility and giant magnetoresistance in the Dirac semimetal Cd${}_3$As${}_2$
• Observation of a topological 3D Dirac semimetal phase in high-mobility Cd3As2
• Discovery of a Weyl Fermion semimetal state in NbAs
• Dirac cones reshaped by interaction effects in suspended graphene
• Quantum anomalous Hall effect and related topological electronic states
• Landau Quantization and Quasiparticle Interference in the Three-Dimensional Dirac Semimetal Cd3As2
• Negative Magnetoresistance in Dirac Semimetal Cd3As2
• Giant negative magnetoresistance induced by the chiral anomaly in individual Cd3As2 nanowires
• Transport evidence for Fermi-arc mediated chirality transfer in the Dirac semimetal Cd${}_3$As${}_2$
• Linear magnetoresistance caused by mobility fluctuations in the n-doped Cd3As2
• Observation of superconductivity in 3D Dirac semimetal Cd3As2 crystal
• 3D quantum Hall effect of Fermi arcs in topological semimetals
• Observation of the quantum Hall effect in confined films of the three-dimensional Dirac semimetal Cd3As2
• Unconventional Superconductivity at Mesoscopic Point-contacts on the 3-Dimensional Dirac Semi-metal Cd${}_3$As${}_2$
• Quantum Hall states observed in thin films of Dirac semimetal Cd3As2
• Room-temperature chiral charge pumping in Dirac semimetals
• Evolution of Weyl orbit and quantum Hall effect in Dirac semimetal Cd3As2
• Observation of an anisotropic Dirac cone reshaping and ferrimagnetic spin polarization in an organic conductor
• Two-Carrier Transport Induced Hall Anomaly and Large Tunable Magnetoresistance in Dirac Semimetal Cd3As2 Nanoplates
• Z_2 and Chiral Anomalies in Topological Dirac Semimetals
• Topological Phase Transition in Single Crystals of $(C{d}_{1-x}Z{n}_x{)}_{3}A{s}_2$
• A Quantized $\nu =5/2$ State in a Two-Subband Quantum Hall System

Cited by in corpus (21)

• Topological Semimetal Nanostructures: From Properties to Topotronics
• Field-Tunable One-Sided Higher-Order Topological Hinge States in Dirac Semimetals
• Quantized surface transport in topological Dirac semimetal films
• Efficient generation of extreme terahertz harmonics in 3D Dirac semimetals
• Molecular beam epitaxy of three-dimensionally thick Dirac semimetal Cd3As2 films
• Two-dimensional Weyl points and nodal lines in pentagonal materials and their optical response
• Progress in epitaxial thin-film Na3Bi as a topological electronic material
• Basal-plane growth of cadmium arsenide by molecular beam epitaxy
• Quantum Hall effect originated from helical edge states in Cd${}_3$As${}_2$
• Disentangling the Competing Mechanisms of Light-Induced Anomalous Hall Conductivity in Three-Dimensional Dirac Semimetal
• Impurity induced topological phase transitions in Cd${}_3$As${}_2$ and Na${}_3$Bi Dirac semimetals
• Enhancement of spin-orbit coupling in Dirac semimetal Cd${}_3$As${}_2$ films by Sb-doping
• Integer quantum Hall effect and enhanced g-factor in quantum confined Cd3As2 films
• Nodal vacancy bound states and resonances in three-dimensional Weyl semimetals
• Doping-induced topological transition and enhancement of thermopower in the Dirac-semimetal system Cd${}_{3-x}$Zn${}_x$As${}_2$
• Controllable p$-$n junctions in three$-$dimensional Dirac semimetal Cd${}_3$As${}_2$ nanowires
• Enhancement of the Thermoelectric Figure of Merit in the Dirac Semimetal Cd${}_3$As${}_2$ by Band-Structure and -Filling Control
• Edge and bulk states in Weyl-orbit quantum Hall effect as studied by Corbino measurements
• Growth and Strain Engineering of Trigonal Te for Topological Quantum Phases in Non-Symmorphic Chiral Crystals
• Tunable spin-charge conversion in class-I topological Dirac semimetals
• The impact of dimensionality on universality of quantum Hall transitions