Origin of the Phonon Hall Effect in Rare-Earth Garnets

Michiyasu Mori, Alexander Spencer-Smith, Oleg P. Sushkov, and Sadamichi Maekawa
Phys. Rev. Lett. 113, 265901 – Published 22 December 2014
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Abstract

The phonon Hall effect has been observed in the paramagnetic insulator Tb3Gd5O12. A magnetic field applied perpendicularly to a heat current induces a temperature gradient that is perpendicular to both the field and the current. We show that this effect is due to resonant skew scattering of phonons from the crystal field states of superstoichiometric Tb3+ ions. This scattering originates from the coupling between the quadrupole moment of Tb3+ ions and the lattice strain. The estimated magnitude of the effect is consistent with experimental observations at T5K and can be significantly enhanced by increasing temperature.

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  • Received 3 July 2014

DOI:https://doi.org/10.1103/PhysRevLett.113.265901

© 2014 American Physical Society

Authors & Affiliations

Michiyasu Mori1, Alexander Spencer-Smith2, Oleg P. Sushkov3, and Sadamichi Maekawa1

  • 1Advanced Science Research Center, Japan Atomic Energy Agency, Tokai 319-1195, Japan
  • 2School of Physics, University of Sydney, Sydney, New South Wales 2006, Australia
  • 3School of Physics, University of New South Wales, Sydney, New South Wales 2052, Australia

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Issue

Vol. 113, Iss. 26 — 31 December 2014

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