An all phosphorene lattice nanometric spin valve.

Area of Science:

• Spintronics and Nanomaterials Science
• Two-dimensional (2D) materials research
• Condensed Matter Physics

Background:

• Phosphorene, a unique semiconducting 2D material, offers potential for advanced spintronic devices.
• Integrating phosphorene into nanoelectronics requires novel device architectures.
• Spin valves are crucial components for spintronics, controlling electron spin for data manipulation.

Purpose of the Study:

• To design and investigate an all-phosphorene lateral spin valve device.
• To explore the spin-dependent transport characteristics and magnetoresistance (MR) properties.
• To identify potential for electric field control and integration into 2D processors.

Main Methods:

• Device design: All-phosphorene lattice lateral spin valve using magnetic 3d-block element substituted atoms.
• Computational approach: First-principles calculations to study spin-dependent transport.
• Analysis: Systematic exploration of MR for various substitutional atoms and bias voltages.

Main Results:

• Colossal magnetoresistance (MR) observed for Vanadium (V) and Chromium (Cr) substitutional atoms.
• A phase diagram illustrating MR behavior was generated, showing tunability via gate voltage.
• Novel features including negative conductance oscillation and MR sign switching were identified.

Conclusions:

• The designed phosphorene spin valve exhibits significant MR, tunable by electric fields.
• The findings pave the way for nanometric spin valves for integrated memory and logic in 2D processors.
• This research advances the development of all-phosphorene based electronic devices.