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arXiv 1912.02011cond-mat.mes-hallphysics.atom-ph
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固体中声子晶格振荡引起的核上电场

Electric field on nucleus due to phonon lattice oscillations in solid states

V. V. Flambaum, I. B. Samsonov

摘要:

在原子和分子中,电子使原子核不受外部电场的影响。然而,如果电场的频率达到原子或分子跃迁的能量,则原子核处的电场可以共振地增强许多数量级。本文研究了固态核上电场屏蔽或增强的机制。我们发现,在介电晶体中的晶格声子振荡起着至关重要的作用,确定电场在MHz-THz区域的核。作为应用,我们提出了一个基于声学声子相干激发的固体中电偶极矩测量的实验方案。

英文摘要:

In atoms and molecules, the electrons screen the nucleus from the external electric field. However, if the frequency of the electric field reaches the energy of atomic or molecular transition, the electric field at the nucleus may be resonantly enhanced by many orders in magnitude. In this paper, we study the mechanisms of screening or enhancement of electric field acting on the nuclei in solid states. We show that in dielectric crystals the phonon oscillations of the lattice play crucial role for determining the electric field on nuclei in the MHz-THz region. As an application, we propose an experimental scheme for measuring nuclear electric dipole moment in a solid state based on the coherent excitation of acoustic phonons.

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