Topological Protected Dirac Cones in Compressed Bulk Black Phosphorus

Abstract

Using the k.p theory and first-principles simulations, we report that applying a moderate pressure (> 0.6 GPa) on black phosphorus can diminish its band gap and produce one-dimensional and even two-dimensional (2D) Dirac cones, distinguishing this material for use in novel non-compound topological insulators. Similar to topological insulators, these 2D Dirac cones result from two competing mechanisms: the unique linear band dispersion tends to open a gap via a "pseudo spin-orbit" coupling, while the band symmetry requirements preserve the material's gapless spectrum. Moreover, these unique Dirac cones are bulk states that do not require time-reversal symmetry, thus they are robust even in the presence of surface or magnetic perturbations. Ultimately, we show that our predictions can be detected by the material's unusual Landau levels.

5 pages and 5 figures

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Cited by in corpus (14)

• Landau levels and magneto-transport property of monolayer phosphorene
• Valleytronics in merging Dirac cones: All-electric-controlled valley filter, valve and universal reversible logic gate
• Strain-induced topological phase transition in phosphorene and phosphorene nanoribbons
• Large Frequency Change with Thickness in Interlayer Breathing Mode - Significant Interlayer Interactions in Few Layer Black Phosphorus
• Two-Dimensional Dirac Fermions Protected by Space-Time Inversion Symmetry in Black Phosphorus
• The Critical Role of Substrate in Stabilizing Phosphorene Nanoflake: A Theoretical Exploration
• Strain-controlled fundamental gap and structure of bulk black phosphorus
• Topological Phase Transition and Chiral-Anomaly Driven Negative Magneto-Resistance in Bulk Black Phosphorus
• Unconventional Strain-Dependent Conductance Oscillations in Pristine Phosphorene
• Proximity induced Colossal Conductivity Modulation in Phosphorene
• Strain-induced Weyl and Dirac states and direct-indirect gap transitions in group-V materials
• Vertex corrections to the dc conductivity in anisotropic multiband systems
• Monolayer phosphorene under time-dependent magnetic field
• Exchange effect and magneto-plasmon mode dispersion in an anisotropic two-dimensional electronic system