<i>Spin Temperature and Nuclear Magnetic Resonance in Solids</i>

Goodman, Murray; Schumacher, R. T.

doi:10.1063/1.3070688

Cited by 205 publications

(179 citation statements)

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“…This describes the evolution of dipolar-coupled spins under weak RF irradiation (i.e. 2pm 1 ( x D ), such as ihMT prepulses [17,30,31]. It has been applied to both MT [32][33][34] and ihMT [5].…”

Section: The Provotorov Equations For Continuous-wave Ihmt Prepulsesmentioning

confidence: 98%

“…It has been applied to both MT [32][33][34] and ihMT [5]. Provotorov theory takes the thermodynamic viewpoint, treating the system as two uncoupled Zeeman and dipolar reservoirs, with inverse spin temperatures b Z and b D , respectively [17,25]. b Z describes the degree of order in the B 0 field and relaxes with time constant T 1 , whereas b D describes the degree of order in the spins' local fields and relaxes with time constant T 1D .…”

Section: The Provotorov Equations For Continuous-wave Ihmt Prepulsesmentioning

confidence: 99%

“…When weak RF is applied at a single offset D, the Provotorov equations including spin-lattice relaxation are [17] …”

Section: The Provotorov Equations For Continuous-wave Ihmt Prepulsesmentioning

confidence: 99%

“…In addition to the explanation based on inhomogeneous broadening, more recent work by Varma et al used Provotorov theory to describe the fundamental physics of ihMT [5,17]. When radiofrequency (RF) irradiation is applied at one offset, magnetization is able to flow between the Zeeman and dipolar reservoirs, but when RF is applied at both offsets simultaneously, the coupling to the dipolar reservoir is severed.…”

Section: Introductionmentioning

confidence: 97%

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The physical mechanism of “inhomogeneous” magnetization transfer MRI

Manning

Chang

MacKay

et al. 2017

Journal of Magnetic Resonance

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Section: The Provotorov Equations For Continuous-wave Ihmt Prepulsesmentioning

confidence: 98%

Section: The Provotorov Equations For Continuous-wave Ihmt Prepulsesmentioning

confidence: 99%

“…When weak RF is applied at a single offset D, the Provotorov equations including spin-lattice relaxation are [17] …”

Section: The Provotorov Equations For Continuous-wave Ihmt Prepulsesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 97%

See 2 more Smart Citations

The physical mechanism of “inhomogeneous” magnetization transfer MRI

Manning

Chang

MacKay

et al. 2017

Journal of Magnetic Resonance

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“…The value of the magnetic field acting on the electron spins from the side of the nuclear ones can be found with the aid of the concept of the spin temperature of nuclei Θ [16,19]. The spin temperature in a stationary state can be found from the condition of equality of the energy averaged over the whole ensemble of nuclear spins that enters into the spin system and leaves it to enter the lattice [20,21].…”

mentioning

confidence: 99%

Polarization of Luminescence in the Nanostructure Si/CaF2 Upon Polarization of the Nuclear Spins of Fluorine

Danilyuk

Борисенко

2005

J Appl Spectrosc

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The laws governing polarization of luminescence in the nanostructure Si/CaF 2 upon polarization of the spins of the fluorine nuclei by means of optical excitation of charge carriers are considered theoretically. The possibility of studying experimentally the properties of nuclear spins in analyzing luminescence is shown. The polarization of luminescence is most informative in the range of excitation rates of charge carriers from 3⋅10 7 to 3⋅10 8 sec −1 with the CaF 2 layer of thickness from 0.6 to 0.8 nm and optical excitation polarization degree of 0.1. Introduction.Experimental study of the laws governing polarization and relaxation of nuclear spins in lowdimensional structures on excitation of an electronic subsystem is a particularly urgent problem for nano-and optoelectronics, spintronics, memory on nuclear spins, and quantum computations [1,2]. For these purposes, it is advisable to use methods of optical detection that involve the spectroscopy of spin-polarized electron transitions in low-dimensional structures. Among the most informative methods is the method of polarized luminescence in which the magnitude of recombination radiation polarization in a magnetic field perpendicular to the direction of nuclear magnetization is measured [3].Polarization of the nuclear spins of fluorine in volumetric samples of CaF 2 containing paramagnetic impurities is usually conducted by saturating hyperfine interaction between paramagnetic centers (U 3+ , Mn 2+ , Ce 3+ ) and the 19 F nuclei by a radio-frequency field [4][5][6]. The use of spin-polarized charge carriers [3] to polarize fluorine nuclei in volumetric samples is, however, not very effective since CaF 2 is a dielectric. To overcome this shortcoming, we suggested in [2] to use periodic nanostructures Si/CaF 2 that provide a fundamentally new possibility of polarizing the nuclear spins of fluorine due to interaction with a spin-polarized electronic subsystem. Alteration of nano-sized layers of Si and CaF 2 makes it possible to use optical or injection excitation in order to obtain in silicon a significant number of nonequilibrium spin-polarized charge carriers that, while interacting with fluorine in the neighboring regions of CaF 2 , ensure spin polarization of the nuclei of the latter.At the same time, typical of the Si/CaF 2 structure is luminescence (at a wavelength from 560 to 580 nm) because of the presence of a direct-band transition in nano-sized silicon [7,8]; this luminescence makes it possible to carry out spectroscopic investigations of spin-polarized electron transitions in it. However, informative experimental study of luminescence polarization is possible only if there is a model describing polarization of recombination radiation in the Si/CaF 2 structure.The aim of the present work is a theoretical analysis of luminescence polarization in the periodic nano-sized Si/CaF 2 structure which is associated with polarization of the nuclear spins of fluorine via optical excitation of electron transitions. It is assumed that this structure lacks magnetic ...

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NMR Based Quantum Information Processing: Achievements and Prospects

et al. 2000

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Nuclear magnetic resonance (NMR) provides an experimental setting to explore physical implementations of quantum information processing (QIP). Here we introduce the basic background for understanding applications of NMR to QIP and explain their current successes, limitations and potential. NMR spectroscopy is well known for its wealth of diverse coherent manipulations of spin dynamics. Ideas and instrumentation from liquid state NMR spectroscopy have been used to experiment with QIP. This approach has carried the field to a complexity of about 10 qubits, a small number for quantum computation but large enough for observing and better understanding the complexity of the quantum world. While liquid state NMR is the only present‐day technology about to reach this number of qubits, further increases in complexity will require new methods. We sketch one direction leading towards a scalable quantum computer using spin 1/2 particles. The next step of which is a solid state NMR‐based QIP capable of reaching 10—30 qubits.

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Spin Temperature and Nuclear Magnetic Resonance in Solids

Cited by 205 publications

References 0 publications

The physical mechanism of “inhomogeneous” magnetization transfer MRI

The physical mechanism of “inhomogeneous” magnetization transfer MRI

Polarization of Luminescence in the Nanostructure Si/CaF2 Upon Polarization of the Nuclear Spins of Fluorine

NMR Based Quantum Information Processing: Achievements and Prospects

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