Comment on "Giant electromechanical coupling of relaxor ferroelectrics controlled by polar nanoregion vibrations".
Comment on "Giant electromechanical coupling of relaxor ferroelectrics controlled by polar nanoregion vibrations".
复制标题
评论“由极性纳米区域振动控制的弛豫铁电体的巨型机电耦合”。
DOI：
10.1126/sciadv.aar5066
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发表时间：
2019
期刊：
影响因子：
13.6
通讯作者：
Gehring PM
中科院分区：
文献类型：
--
作者：
Gehring PM
Manleyet al.（Science Advances，2016年9月16日，第e1501814页）报道了使用中子散射方法在弛豫铁电体Pb[（Mg 1/3 Nb 2/3）1−xTix] O3（x = 0.30）中低于TC的横向声学声子分支的分裂。Manleyet等人认为，这种分裂的发生是因为这些声子与极性纳米区域相关的局部谐波晶格振动杂交。我们表明，分裂是不存在的测量时，使用不同的中子波长，我们提出了另一种解释。
Manleyet al.(Science Advances, 16 September 2016, p. e1501814) report the splitting of a transverse acoustic phonon branch belowTCin the relaxor ferroelectric Pb[(Mg1/3Nb2/3)1−xTix]O3withx= 0.30 using neutron scattering methods. Manleyet 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.