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Manley et al. (Science Advances, 16 September 2016, p. e1501814) report the splitting of a transverse acoustic phonon branch below TC in the relaxor ferroelectric Pb[(Mg1/3Nb2/3)1-xTix]O3 with x = 0.30 using neutron scattering methods. Manley et al. argue that this occurs because these phonons hybridize with local, harmonic lattice vibrations associated with polar nanoregions. We show that this splitting is absent when the measurement is made using a different neutron wavelength. It is therefore spurious.
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Tuning order from disordered ground states in geometrically frustrated classical "non-hbar" materials
1/01/15 → 31/12/19