Modulation of spin and charge currents through functionalized 2D diamond devices.

Area of Science:

• Materials Science
• Condensed Matter Physics
• Quantum Chemistry

Background:

• Two-dimensional (2D) materials offer unique electronic properties.
• Functionalization of 2D materials is key to tailoring their characteristics.
• Diamond's potential in spintronics remains an active area of research.

Purpose of the Study:

• Investigate the impact of hydroxyl (-OH) and fluorine (-F) functionalization on 2D diamond.
• Explore the resulting electronic and magnetic properties for spintronic applications.
• Analyze device performance, including resistance, current, and rectification.

Main Methods:

• Utilized first-principles calculations for theoretical analysis.
• Examined the influence of functional group coverage and distribution.
• Simulated device structures with gold contacts.

Main Results:

• Surface functionalization significantly alters the sp2/sp3 hybridization ratio in 2D diamond.
• Reduced functional group coverage leads to decreased band gap and magnetic moment.
• Hydroxyl-functionalized devices exhibit lower resistance than fluorine-functionalized ones.
• Current rectification direction is tunable by surface coverage in fluorine-functionalized 2D diamond.
• Spin filter behavior is observed across studied systems.

Conclusions:

• Functionalized 2D diamond is a viable candidate for spin-dependent electronic devices.
• Surface chemistry offers a pathway to control electronic transport and spintronic properties.
• The study provides insights into designing next-generation spintronic components.