Impurity scattering and Friedel oscillations in mono-layer black phosphorus

Abstract

We study the effect of impurity scattering effect in black phosphorurene (BP) in this work. For single impurity, we calculate impurity induced local density of states (LDOS) in momentum space numerically based on tight-binding Hamiltonian. In real space, we calculate LDOS and Friedel oscillation analytically. LDOS shows strong anisotropy in BP. Many impurities in BP are investigated using $T$-matrix approximation when the density is low. Midgap states appear in band gap with peaks in DOS. The peaks of midgap states are dependent on impurity potential. For finite positive potential, the impurity tends to bind negative charge carriers and vise versa. The infinite impurity potential problem is related to chiral symmetry in BP.

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Cited by in corpus (12)

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• Fraunhofer response and supercurrent spin switching in black phosphorus with strain and disorder
• Aharonov-Bohm effect in monolayer black phosphorus (phosphorene) nanorings
• Impurity scattering on the surface of topological insulator thin films
• Control of superconducting pairing symmetries in monolayer black phosphorus
• Atomistic $T$-matrix theory of disordered 2D materials: Bound states, spectral properties, quasiparticle scattering, and transport
• Electronic Self-passivation of Single Vacancy in Black Phosphorus via a Controlled Ionization
• Theory of Friedel oscillations in monolayer graphene and group-VI dichalcogenides in a magnetic field
• Robust wavefront dislocations of Friedel oscillations in gapped graphene
• Impurity Screening and Friedel Oscillations in Floquet-driven Two-dimensional Metals
• Enhanced thermoelectric properties in phosphorene nanorings
• Anomalous impurity-induced charge modulations in black phosphorus