Dielectric relaxation in a deuteron glass

Banerjee, Varsha ; Dattagupta, Sushanta (2003) Dielectric relaxation in a deuteron glass Physical Review B: Condensed Matter and Materials Physics, 68 (5). 054202_1-054202_8. ISSN 1098-0121

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Official URL: http://prb.aps.org/abstract/PRB/v68/i5/e054202

Related URL: http://dx.doi.org/10.1103/PhysRevB.68.054202


We obtain the dielectric susceptibility of a deuteron glass based on a mean-field analysis of an Ising model with random bond strengths and random fields using a system-plus-bath approach. The two Ising pseudospin states represents two equivalent sites that the deuteron can occupy. Relaxation is caused by the random jumps of the deuteron from one site to another. It is then reasonable to assume an Arrhenius form of relaxation, on which we find that our derived results are in good qualitative agreement with experimental measurements on recently studied prototypical deuteron glasses, namely, Rb1-x(ND4)xD2PO4 and Rb1-x(ND4)xD2AsO4, above the glass transition.

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Source:Copyright of this article belongs to American Physical Society.
ID Code:9235
Deposited On:29 Oct 2010 11:12
Last Modified:08 Feb 2011 08:08

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