The Journal of Physical Chemistry Letters· 2026Q1
Spin-Phonon Relaxation and Decoherence in a Three-Dimensional Paired-Ion Framework Composed of Vanadyl Porphyrin Qubits
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- Q1SCImago
- 2026year
Short summary
Researchers developed a 3D framework (VO-3D-PIF-1) with a high density of vanadyl porphyrin spin qubits (0.125 spins/nm3), achieving spin decoherence times (Tm) of 200–400 ns and finding that framework assembly did not negatively impact spin-lattice relaxation (T1).
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Key points
- Developed the first 3D paired-ion framework (VO-3D-PIF-1) for vanadyl porphyrin spin qubits.
- Achieved a high spin density of 0.125 spins/nm3 within the framework.
- Measured spin decoherence times (Tm) of 200–400 ns at temperatures from 5–140 K.
- Spin-lattice relaxation (T1) was unaffected by framework assembly, mirroring dilute solution behavior.
AI-generated from the title and abstract; the full text is not read.
Abstract
Abstract Molecular electron spin qubits are an emerging platform for quantum technologies due to their atomic-scale synthetic tunability. Supramolecular structures can also place these qubits at precise positions within ordered arrays, allowing the scale-up of qubit architectures through a bottom-up approach. Here, we introduce the first three-dimensional paired-ion framework (PIF), VO-3D-PIF-1, which is composed of a concentrated array of S = 1/2 vanadyl porphyrin spin qubits arranged by ionic lattice interactions. The PIF was characterized using electron paramagnetic resonance spectroscopy to demonstrate the impact of framework structure and spin density on spin–lattice relaxation (T1) and spin decoherence (Tm). The high vanadyl porphyrin spin density within the framework (0.125 spins/nm3) promotes dipolar-driven decoherence, with Tm = 200–400 ns over a temperature range of 140–5 K. Spin–lattice relaxation mirrors that of vanadyl porphyrins in dilute solution, suggesting that the weak ionic interactions assembling the porphyrins within the secondary coordination sphere do not adversely affect phonon-induced T1 relaxation.
The authors' abstract, as published at the source. The Journal of Physical Chemistry Letters, 2026 · DOI ↗
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Field: Electronic, Optical and Magnetic Materials
Electronic, Optical and Magnetic MaterialsMaterials Science