Partial breakdown of translation symmetry at a structural quantum critical point associated with a ferroelectric soft mode

Partial breakdown of translation symmetry at a structural quantum critical point associated with a ferroelectric soft mode
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与铁电软模式相关的结构量子临界点处平移对称性的部分破坏

DOI:
10.1103/physrevb.106.134111
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发表时间:
2022
期刊:
影响因子:
3.7
通讯作者:
Mori S.
Mori S.
中科院分区:
物理与天体物理2区
文献类型:
--
作者:
Ishii Y.;Yamamoto A.;Sato N.;Nambu Y.;Ohira-Kawamura S.;Murai N.;Ohara K.;Kawaguchi S.;Mori T.;Mori S.

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我们报告说,声子驱动的结构相变的完全抑制导致部分故障的三维平移对称性在一个定义良好的子晶格。这种状态是揭示了一个介电化合物,它包括一个网络纳入六方Ba(Sr)亚晶格。对分布函数分析和非弹性中子散射实验提供了明确的证据thenetwork形成一个连续的Al-O短程关联类似的玻璃,而Ba(Sr)亚晶格保留了原来的平移对称性。这种玻璃状网络显著地抑制了声子谱,并将其转变为类似于通常在玻璃材料中观察到的那些的宽声子谱。
We report that complete suppression of a phonon-driven structural phase transition causes partial breakdown of a three-dimensional translation symmetry in a well-defined sublattice. This state is revealed for a dielectric compound,, that comprises annetwork incorporated into a hexagonal Ba(Sr) sublattice. Pair distribution function analyses and inelastic neutron scattering experiments provide clear-cut evidence of thenetwork forming a continuum of Al-O short-range correlations similar to glasses, whereas the Ba(Sr) sublattice preserves the original translational symmetry. This glassy network significantly dampens the phonon spectrum and transforms it into the broad one resembling those typically observed in glass materials.
DOI: 10.1016/0022-3093(78)90108-4
发表时间: 1978
期刊:
影响因子: --
作者:
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通讯作者: W. Phillips
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DOI: --
发表时间: 2016
期刊: Scientific Reports
影响因子: 4.6
作者:
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通讯作者: S. Mori