Quantum spin coherence and electron spin distribution channels in vanadyl-containing lantern complexes.

Area of Science:

• Inorganic Chemistry
• Quantum Computing Materials
• Spin Chemistry

Background:

• Vanadyl complexes (S = 1/2) are explored for quantum applications.
• Heterobimetallic complexes offer tunable electronic properties.

Purpose of the Study:

• Investigate heterobimetallic Pt-VO lantern complexes as charge-neutral electronic qubits.
• Evaluate their spin coherence and manipulation capabilities.

Main Methods:

• Synthesis and characterization of Pt-VO complexes.
• X-band Electron Paramagnetic Resonance (EPR) spectroscopy.
• Density Functional Theory (DFT) calculations.
• Spin relaxation measurements.
• Observation of Rabi oscillations.

Main Results:

• Highly resolved EPR spectra showing hyperfine coupling with 51V and 195Pt.
• DFT calculations indicate predominant π-pathway for spin density delocalization.
• Favorable spin relaxation times (T_m) of 1-11 μs.
• Coherent spin manipulations demonstrated at 70 K via Rabi oscillations.

Conclusions:

• The presence of the heavy Group 10 metal (Pt) does not impede vanadyl coherence.
• Pt-VO lantern complexes are robust spin-coherent building blocks.
• These complexes hold potential for materials science and quantum technologies.