Quantum Electric Dipole Lattice
Quantum Electric Dipole Lattice
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DOI：
10.1007/s10762-018-0472-8
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发表时间：
2018-02
期刊：
影响因子：
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通讯作者：
M. Dressel;E. Zhukova;V. Thomas;B. Gorshunov
中科院分区：
文献类型：
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作者：
M. Dressel;E. Zhukova;V. Thomas;B. Gorshunov
由于水在生物物质中的重要性，水受到了激烈的调查，但保留了许多秘密。在这里，我们通过将H2O分子限制在纳米尺寸的笼子里来揭示另一个方面。我们的太赫兹和红外光谱的水在宝石绿柱石证据量子隧穿水分子在晶格中。水分子被限制在纳米笼中时会散开。结合低频介电测量，我们也能够表明，偶极耦合之间的H2O分子导致在低温下的铁电状态。在冷却时，铁电软模式通过THz范围移位。只有量子涨落才能阻止完美的宏观秩序完全实现。除了对生命科学的意义和可能的应用外，纳米承压水可能成为量子电偶极晶格的主要例子。
Water is subject to intense investigations due to its importance in biological matter but keeps many of its secrets. Here, we unveil an even other aspect by confining H2O molecules to nanosize cages. Our THz and infrared spectra of water in the gemstone beryl evidence quantum tunneling of H2O molecules in the crystal lattice. The water molecules are spread out when confined in a nanocage. In combination with low-frequency dielectric measurements, we were also able to show that dipolar coupling among the H2O molecules leads towards a ferroelectric state at low temperatures. Upon cooling, a ferroelectric soft mode shifts through the THz range. Only quantum fluctuations prevent perfect macroscopic order to be fully achieved. Beside the significance to life science and possible application, nanoconfined water may become the prime example of a quantum electric dipolar lattice.