Theoretical study of NMR relaxation due to rattling phonons

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dc.creatorDahm, Thomas
dc.creatorUeda, Kazuo
dc.date2007-10-30
dc.date.accessioned2026-07-07T12:51:02Z
dc.date.available2026-07-07T12:51:02Z
dc.descriptionWe calculate the NMR relaxation rate due to quadrupolar coupling of the nucleus to a local, strongly anharmonic phonon mode. As a model potential for a rattling motion we consider a square-well potential. We calculate the free phonon Green's function analytically and derive the low and high temperature limits of the NMR relaxation rate. It is shown that the temperature dependence of the NMR relaxation rate possesses a peak in contrast to harmonic phonons but in qualitative agreement with a recent NMR study on KOs2O6. We discuss the influence of phonon renormalization due to electron-phonon interaction.
dc.description5 pages, 3 figures, SNS2007 (Sendai, Japan) conference proceedings, accepted for publication
dc.identifierhttps://arxiv.org/abs/0710.5668
dc.identifierhttp://arxiv.org/abs/0710.5668
dc.identifierJ. Phys. Chem. Solids 69, 3160 (2008)
dc.identifierdoi:10.1016/j.jpcs.2008.06.048
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/222868
dc.subjectSuperconductivity
dc.subjectMaterials Science
dc.titleTheoretical study of NMR relaxation due to rattling phonons
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