Transition-Metal Phthalocyanines as Versatile Building Blocks for Molecular Qubits on Surfaces

Area of Science:

• Materials Science
• Quantum Computing
• Surface Chemistry

Background:

• Autonomous self-organization of molecular building units is key for novel materials like metal-organic frameworks.
• Surface-based molecular architectures, especially those with S = 1/2 molecular spin, are crucial for advanced quantum materials and devices.

Purpose of the Study:

• To systematically investigate the electronic and magnetic properties of 3d transition-metal phthalocyanines.
• To evaluate the suitability of these molecules as potential surface-based molecular spin qubits.

Main Methods:

• Utilized density functional theory (DFT) calculations to study electronic and magnetic properties.
• Calculated hyperfine parameters for a series of 3d transition-metal atoms within phthalocyanine structures.
• Performed transport simulations on selected candidate molecules.

Main Results:

• Comprehensive electronic and magnetic property data were obtained for the entire 3d transition-metal series in phthalocyanines.
• Hyperfine parameters crucial for qubit applications were systematically analyzed.
• Transport simulations identified promising candidates for molecular spin qubits on surfaces.

Conclusions:

• Transition-metal phthalocyanines are promising candidates for creating molecular spin qubits on surfaces.
• The study provides a theoretical foundation for designing future quantum devices based on these materials.