UNSPECIFIED (2006) Time dependence of muon spin relaxation spectra and spin correlation functions. PHYSICAL REVIEW B, 73 (1). -. doi:10.1103/PhysRevB.73.012408 ISSN 1098-0121.

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Abstract

The existing theory of the microscopic interpretation of the dynamical contribution to zero-field muon depolarization spectra in a longitudinal geometry is developed. The predicted relaxation of the muon depolarization is calculated from two forms of the spin correlation function. First, when the spin correlation function has an exponential form with a single wave-vector-dependent relaxation rate considered, it is shown that this form of the spin correlation function reproduces the slow and fast fluctuation limits of stochastic spin theory regardless of the choice of microscopic spin model. Second, if the spin correlation function is a homogeneous scaling function (such as a power-law decay with time), as suggested by the mode-coupling theory of spin dynamics, this results in a stretched exponential relaxation of the muon spectra. For simple spin diffusion, the muon spectra are shown to be relaxed with a root-exponential form.

Item Type:	Journal Article
Subjects:	Q Science > QC Physics
Journal or Publication Title:	PHYSICAL REVIEW B
Publisher:	AMERICAN PHYSICAL SOC
ISSN:	1098-0121
Official Date:	January 2006
Dates:	Date Event January 2006 UNSPECIFIED
Volume:	73
Number:	1
Number of Pages:	4
Page Range:	-
DOI:	10.1103/PhysRevB.73.012408
Publication Status:	Published

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