PT  - JOURNAL ARTICLE
AU  - Gehring, P. M.
AU  - Xu, Zhijun
AU  - Stock, C.
AU  - Xu, Guangyong
AU  - Parshall, D.
AU  - Harriger, L.
AU  - Gehring, C. A.
AU  - Li, Xiaobing
AU  - Luo, Haosu
TI  - Comment on “Giant electromechanical coupling of relaxor ferroelectrics controlled by polar nanoregion vibrations”
AID  - 10.1126/sciadv.aar5066
DP  - 2019 Mar 01
TA  - Science Advances
PG  - eaar5066
VI  - 5
IP  - 3
4099  - http://advances.sciencemag.org/content/5/3/eaar5066.short
4100  - http://advances.sciencemag.org/content/5/3/eaar5066.full
SO  - Sci Adv2019 Mar 01; 5
AB  - 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 splitting occurs because these phonons hybridize with local, harmonic lattice vibrations associated with polar nanoregions. We show that splitting is absent when the measurement is made using a different neutron wavelength, and we suggest an alternative interpretation.