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Quantum and classical relaxation in the proton glass

Feng, Yejun and Ancona-Torres, C. and Rosenbaum, T. F. and Reiter, G. F. and Price, D. L. and Courtens, E. (2006) Quantum and classical relaxation in the proton glass. Physical Review Letters, 97 (14). Art. No. 145501. ISSN 0031-9007. https://resolver.caltech.edu/CaltechAUTHORS:20140707-163028104

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Abstract

The hydrogen-bond network formed from a crystalline solution of ferroelectric RbH_2PO_4 and antiferroelectric NH_4H_2PO_4 demonstrates glassy behavior, with proton tunneling the dominant mechanism for relaxation at low temperature. We characterize the dielectric response over seven decades of frequency and quantitatively fit the long-time relaxation by directly measuring the local potential energy landscape via neutron Compton scattering. The collective motion of protons rearranges the hydrogen bonds in the network. By analogy with vortex tunneling in superconductors, we relate the logarithmic decay of the polarization to the quantum-mechanical action.


Item Type:Article
Related URLs:
URLURL TypeDescription
http://dx.doi.org/10.1103/PhysRevLett.97.145501DOIArticle
http://journals.aps.org/prl/abstract/10.1103/PhysRevLett.97.145501PublisherArticle
ORCID:
AuthorORCID
Feng, Yejun0000-0003-3667-056X
Additional Information:© 2006 The American Physical Society. (Received 4 April 2006; published 4 October 2006). We thank G. Crabtree, Y. Galperin, R. Jaramillo, M.-L. Saboungi, G. Seidler, P. Simon, V. Vinokur, and especially S. Nagel for helpful discussions and T. Abdul-Redah, A. Bytchkov, J. Hu, J. Mayers, and D. Silevitch for technical assistance. Work at the University of Chicago was supported by the NSF MRSEC Grant No. DMR-0213745. G. R. acknowledges DOE No. 1-5-555229 for the NCS effort.
Funders:
Funding AgencyGrant Number
NSFDMR-0213745
Department of Energy (DOE)1-5-555229
Issue or Number:14
Classification Code:PACS numbers: 61.43.Fs, 66.35.+a, 77.22.-d, 77.84.Fa
Record Number:CaltechAUTHORS:20140707-163028104
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20140707-163028104
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:46949
Collection:CaltechAUTHORS
Deposited By: George Porter
Deposited On:14 Jul 2014 17:50
Last Modified:03 Oct 2019 06:47

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