Strain-gradient induced topological transition in bent nanoribbons of the Dirac semimetal Cd3As2

Abstract

Dirac semimetal is an ideal parent state to realize various exotic states of matters, such as quantum spin Hall state, Weyl semimetal phase and Majorana zero modes. Topological phase transition allows for the switching between these different topological states. Here, in this paper, we exhibit experimentally an effective approach of inducing topological phase transition in Cd3As2 nanoribbons, by applying a bending strain profile onto the sample. The local strain varies linearly from compression to tension through the cross-section of a bent nanoribbon. The strain gradient causes obvious lattice deformation and breaks the C4 rotational symmetry, thus opening an energy gap at the Dirac points and making the bulk gapful. When further increasing the strain strength, the local strain effect dominates over the symmetry-breaking effect, where spatially-varying band shift becomes prominent across the nanoribbon. Our results demonstrate the effect of strain gradient on the evolution of energy band structures, which should be valuable for further study of strain-mediated topological phase transition.

References in corpus (46)

• Topological Insulators
• Topological insulators and superconductors
• Quantum Spin Hall Insulator State in HgTe Quantum Wells
• Berry Phase Effects on Electronic Properties
• Weyl and Dirac Semimetals in Three Dimensional Solids
• Three Dimensional Dirac Semimetal and Quantum Transports in Cd3As2
• Observation of a topological 3D Dirac semimetal phase in high-mobility Cd3As2
• Classification of stable three-dimensional Dirac semimetals with nontrivial topology
• Robust axion insulator and Chern insulator phases in a two-dimensional antiferromagnetic topological insulator
• Observation of the Quantum Spin Hall Effect up to 100 Kelvin in a Monolayer Crystal
• Topological Semimetals
• Landau Quantization and Quasiparticle Interference in the Three-Dimensional Dirac Semimetal Cd3As2
• Bulk Band Gap and Surface State Conduction Observed in Voltage-Tuned Crystals of the Topological Insulator Bi${}_2$Se${}_3$
• Giant negative magnetoresistance induced by the chiral anomaly in individual Cd3As2 nanowires
• Surface State Transport and Ambipolar Electric Field Effect in Bi2Se3 Nanodevices
• Large linear magnetoresistance in Dirac semi-metal Cd3As2 with Fermi surfaces close to the Dirac points
• Chiral anomaly from strain-induced gauge fields in Dirac and Weyl semimetals
• Observation of the quantum Hall effect in confined films of the three-dimensional Dirac semimetal Cd3As2
• Quantum Hall states observed in thin films of Dirac semimetal Cd3As2
• Aharonov-Bohm oscillations in Dirac semimetal Cd3As2 nanowires
• Inhomogeneous Weyl and Dirac semimetals: Transport in axial magnetic fields and Fermi arc surface states from pseudo Landau levels
• Landau level splitting in Cd3As2 under high magnetic fields
• Anomalous Phase Shift of Quantum Oscillations in 3D Topological Semimetals
• Pseudo-electromagnetic fields in topological semimetals
• $4\pi$ periodic Andreev bound states in a Dirac semimetal
• Torsional chiral magnetic effect in Weyl semimetal with topological defect
• Topological Semimetal Nanostructures: From Properties to Topotronics
• Electric control of topological phase transitions in Dirac semimetal thin films
• Flow diagram of the metal-insulator transition in two dimensions
• Lifshitz transition mediated electronic transport anomaly in bulk ZrTe5
• Two-Carrier Transport Induced Hall Anomaly and Large Tunable Magnetoresistance in Dirac Semimetal Cd3As2 Nanoplates
• Viscoelastic response of topological tight-binding models in two and three dimensions
• Strain Engineering of the Band Gap of HgTe Quantum Wells using Superlattice Virtual Substrates
• Quantum oscillations without magnetic field
• Engineering Weyl nodes in Dirac semimetals by a magnetic field
• Catalyst-Free Growth of Millimeter-Long Topological Insulator Bi2Se3 Nanoribbons and the Observation of pi Berry Phase
• Breakdown of Three-dimensional Dirac Semimetal State in pressurized Cd3As2
• Direct observation of Landau level resonance and mass generation in Dirac semimetal Cd3As2 thin films
• Gate-tuned Aharonov-Bohm interference of surface states in a quasi-ballistic Dirac semimetal nanowire
• Bulk and surface states carried supercurrent in ballistic Nb-Dirac semimetal Cd3As2 nanowire-Nb junctions
• Recent developments in the field of the metal-insulator transition in two dimensions
• Topological surface states in strained Dirac semimetal thin films
• Evidence for pressure-induced node-pair annihilation in Cd3As2
• Impurity induced topological phase transitions in Cd${}_3$As${}_2$ and Na${}_3$Bi Dirac semimetals
• Conductance fluctuations and disorder induced $\nu =0$ quantum Hall plateau in topological insulator nanowires
• Surface-state spin textures in strained bulk HgTe: strain-induced topological phase transitions

Cited by in corpus (4)

• Phase transitions and scale invariance in topological Anderson insulators
• Enhanced Dirac node separation in strained Cd3As2 topological semimetal
• Thermal and mechanical properties and the structural phase transition under pressure in $A$In${}_2$As${}_2$ ($A$ = Ca, Sr, Ba)
• Strain-induced collapse of Landau Levels in real Weyl semimetals