Nonlinear Hall effect in monolayer phosphorene with broken inversion symmetry

Area of Science:

• Condensed Matter Physics
• Materials Science
• Quantum Phenomena

Background:

• The Hall effect is a fundamental phenomenon in condensed matter physics.
• Exploring novel Hall effects in 2D materials is crucial for next-generation electronics.
• Monolayer phosphorene offers unique electronic properties due to its distinct band structure.

Purpose of the Study:

• Investigate the nonlinear Hall effect (NLHE) in monolayer phosphorene.
• Understand the underlying mechanisms driving the observed NLHE.
• Analyze the influence of system parameters and spin-orbit interaction on the NLHE.

Main Methods:

• Theoretical investigation of electronic properties.
• Analysis of Berry curvature and its dipole moment.
• Simulation of nonlinear transport phenomena.

Main Results:

• Phosphorene exhibits a pronounced NLHE driven by Berry curvature dipole moments from proximity-induced symmetry breaking.
• The nonlinear Hall response shows a central minimum and two asymmetric resonance peaks, sensitive to band gap and temperature.
• A phase transition in nonlinear Hall and spin Hall conductivity is observed under spin-orbit interaction.

Conclusions:

• Monolayer phosphorene is a promising material for observing and utilizing the NLHE.
• The study elucidates the role of Berry curvature and band structure anisotropy in NLHE.
• Findings suggest potential for tuning electronic properties via spin-orbit interaction.