Davies ENDOR revisited: Enhanced sensitivity and nuclear spin relaxation

Abstract

Over the past 50 years, electron-nuclear double resonance (ENDOR) has become a fairly ubiquitous spectroscopic technique, allowing the study of spin transitions for nuclei which are coupled to electron spins. However, the low spin number sensitivity of the technique continues to pose serious limitations. Here we demonstrate that signal intensity in a pulsed Davies ENDOR experiment depends strongly on the nuclear relaxation time T1n, and can be severely reduced for long T1n. We suggest a development of the original Davies ENDOR sequence that overcomes this limitation, thus offering dramatically enhanced signal intensity and spectral resolution. Finally, we observe that the sensitivity of the original Davies method to T1n can be exploited to measure nuclear relaxation, as we demonstrate for phosphorous donors in silicon and for the endohedral fullerene N@C60 in CS2.

References in corpus (3)

• Electron Spin-Relaxation Times of Phosphorus Donors in Silicon
• Electron spin relaxation of N@C60 in CS2
• A new mechanism for electron spin echo envelope modulation

Cited by in corpus (16)

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• Coherent storage of microwave excitations in rare-earth nuclear spins
• Hybrid solid state qubits: the powerful role of electron spins
• Simultaneous sub-second hyperpolarization of the nuclear and electron spins of phosphorus in silicon
• Coherent spin dynamics of ytterbium ions in yttrium orthosilicate
• Conditional control of donor nuclear spins in silicon using Stark shifts
• Spin-Dependent Scattering off Neutral Antimony Donors in 28-Si Field-Effect Transistors
• Quantum non-demolition measurements of single donor spins in semiconductors
• Hyperfine Structure and Coherent Dynamics of Rare Earth Spins Explored with Electron-Nuclear Double Resonance at Sub-Kelvin Temperatures
• ${}^{29}$Si nuclear spins as a resource for donor spin qubits in silicon
• Tomography of entangling two-qubit logic operations in exchange-coupled donor electron spin qubits
• Host isotope mass effects on the hyperfine interaction of group-V donors in silicon
• Anisotropic Stark Effect and Electric-Field Noise Suppression for Phosphorus Donor Qubits in Silicon
• Scalable entanglement of nuclear spins mediated by electron exchange
• Nuclear spin decoherence of neutral ${}^{31}$P donors in silicon: Effect of environmental ${}^{29}$Si nuclei
• Electron nuclear double resonance with donor-bound excitons in silicon