Phonon scattering from ferroelectric domain walls: Phonon imaging in KDP

M. A. Weilert, M. E. Msall, A. C. Anderson, and J. P. Wolfe
Phys. Rev. Lett. 71, 735 – Published 2 August 1993
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Abstract

The ferroelectric domain wall is an ideal interface for studies of the boundary scattering of high frequency acoustic phonons. These internal interfaces have no contamination and can be reversibly created and destroyed by application of an electric field at the phase transition—122 K in KDP. Images of phonons in single- and multiple-domain cases show remarkable differences in the ballistic heat flux. Theoretical modeling based on acoustic wave reflection reveals that the domain walls act as nearly perfect grain boundaries.

  • Received 1 February 1993

DOI:https://doi.org/10.1103/PhysRevLett.71.735

©1993 American Physical Society

Authors & Affiliations

M. A. Weilert, M. E. Msall, A. C. Anderson, and J. P. Wolfe

  • Department of Physics and Materials Research Laboratory, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801

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Vol. 71, Iss. 5 — 2 August 1993

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