Paradigm shift for quantum paraelectric: softening of longitudinal modes
Paradigm shift for quantum paraelectric: softening of longitudinal modes
复制标题
量子顺电的范式转变：纵模的软化
DOI：
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发表时间：
2020
期刊：
影响因子：
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通讯作者：
Yaron Kedem
中科院分区：
文献类型：
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作者：
Yaron Kedem
我们重新审视量子相变从顺电态到铁电的一个，特别是广泛的纵向模式之间的区别，横向一个。与有限温度下的跃迁相反，对于打破离散对称性的量子相变，模式之间的分裂是无关紧要的。我们证明了量子相变中的各向异性导致了与经典相变不同的行为，并提出了观察它的实验，这一结果对于解释钛酸锶中的配对机制是必不可少的。
We revisit the quantum phase transition from a paraelectric state to a ferroelectric one and in particular the widespread distinction between a longitudinal modes to transverse one. In contrast to transitions at finite temperature, for a quantum phase transition breaking a discrete symmetry the splitting between the modes is irrelevant. We show that an anisotropy in the context of a quantum phase transition leads to a different behavior, compared to a classical transition, and suggest an experiment to observe it. The result is essential for explaining the pairing mechanism in strontium titanate.