Microwave-Free Dynamic Nuclear Polarization via Sudden Thermal Jumps

Meriles, Carlos A.; Zangara, Pablo R.

doi:10.1103/physrevlett.128.037401

Cited by 4 publications

(1 citation statement)

References 31 publications

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“…Interestingly, electronic/nuclear state hybridization near a level crossing is expected to preserve the polarization efficiency of rf excitation, even at high fields 30 . This feature compares favorably with regular DNP, where polarization mechanisms such as the solid effect become less effective as the field grows due to gradual truncation of the pseudosecular term 31 .…”

Section: Discussionmentioning

confidence: 99%

Information-Guided Dynamic Nuclear Polarization

et al. 2022

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A spin ensemble in thermal equilibrium continuously undergoes random fluctuations analogous to those observed in Brownian motion, a process known as spin noise. Here we investigate the dynamics of a system comprising a spin-1 paramagnetic center and a hyperfine-coupled spin-1/2 nucleus in the vicinity of a level crossing. We theoretically show that nuclear spins polarize efficiently under the combined action of thermal fluctuations and a closed-loop feedback protocol. The latter articulates periodic observations of the electronic magnetization and radio-frequency pulses connecting hybrid states with opposite nuclear spin alignment. Since nuclear polarization emerges from electronic spin fluctuations, not spin order, this microwave-free technique generically benefits from warmer, not colder, operation temperatures. Further, because the spin dynamics at play near a level crossing is rather insensitive to the absolute value of the magnetic field, our work promises opportunities for high-field dynamic nuclear polarization, difficult to attain through present methods.

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Section: Discussionmentioning

confidence: 99%

Information-Guided Dynamic Nuclear Polarization

et al. 2022

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Dynamic nuclear polarization mechanism in isolated NV-centers at high magnetic fields

Debadatta,

Jain

2024

Journal of Magnetic Resonance Open

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Hyperpolarisation techniques

Equbal,

Mewis

2023

Nuclear Magnetic Resonance

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This chapter focuses on the literature published in 2022, covering hyperpolarisation techniques associated with NMR. The literature reviewed relates to the hyperpolarisation techniques of dynamic nuclear polarisation (DNP), spin-exchange optical pumping (SEOP), parahydrogen induced polarisation (PHIP) and signal amplification by reversible exchange (SABRE). In addition to reviewing studies that have been conducted using these techniques, a number of reports are discussed that relate to advances in associated hardware and instrumentation.

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Microwave-Free Dynamic Nuclear Polarization via Sudden Thermal Jumps

Cited by 4 publications

References 31 publications

Information-Guided Dynamic Nuclear Polarization

Information-Guided Dynamic Nuclear Polarization

Dynamic nuclear polarization mechanism in isolated NV-centers at high magnetic fields

Hyperpolarisation techniques

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