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This article is cited in 4 scientific papers (total in 4 papers)
CONDENSED MATTER
On the effect of an inhomogeneous magnetic field and many-body localization on the increase in the second moment of multiple-quantum NMR with time
V. E. Zobova, A. A. Lundinb a Kirensky Institute of Physics, Federal Research Center KSC, Siberian Branch, Russian Academy of Sciences, Krasnoyarsk, Russia
b Semenov Institute of Chemical Physics, Russian Academy of Sciences, Moscow, Russia
Abstract:
A change in the time dependence of the second moment of the distribution of intensities of coherences with various orders in the spectrum of multiple-quantum NMR in a solid at the inclusion of an inhomogeneous magnetic field in the effective interaction is studied. Both the secular dipole-dipole and nonspecular twoquantum interactions are considered as nucleus-nucleus interactions, which correspond to traditional experimental realizations. It is shown that, with an increase in the magnitude of the inhomogeneous field, an exponential increase in the second moment of multiple-quantum NMR with time changes to a power-law increase. The results obtained in this work indicate that this second moment, which determines the average number of dynamically correlated spins, can be used as a convenient characteristic for studying a transition to a many-body localized state.
Received: 16.03.2017 Revised: 24.03.2017
Citation:
V. E. Zobov, A. A. Lundin, “On the effect of an inhomogeneous magnetic field and many-body localization on the increase in the second moment of multiple-quantum NMR with time”, Pis'ma v Zh. Èksper. Teoret. Fiz., 105:8 (2017), 499–503; JETP Letters, 105:8 (2017), 514–518
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https://www.mathnet.ru/eng/jetpl5246 https://www.mathnet.ru/eng/jetpl/v105/i8/p499
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Abstract page: | 155 | Full-text PDF : | 26 | References: | 37 | First page: | 6 |
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