Publication Date:
2019
Description:
〈p〉Manley 〈i〉et al.〈/i〉 (〈i〉Science Advances〈/i〉, 16 September 2016, p. e1501814) report the splitting of a transverse acoustic phonon branch below 〈i〉T〈/i〉〈i〉〈sub〉C〈/sub〉〈/i〉 in the relaxor ferroelectric Pb[(Mg〈sub〉1/3〈/sub〉Nb〈sub〉2/3〈/sub〉)〈sub〉1–〈i〉x〈/i〉〈/sub〉Ti〈i〉〈sub〉x〈/sub〉〈/i〉]O〈sub〉3〈/sub〉 with 〈i〉x〈/i〉 = 0.30 using neutron scattering methods. Manley 〈i〉et al.〈/i〉 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.〈/p〉
Electronic ISSN:
2375-2548
Topics:
Natural Sciences in General
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