全息非均匀晶格中的公度锁定
Commensurate lock-in in holographic non-homogeneous lattices
摘要：
我们考虑在全息模型中自发形成条纹结构，该模型具有明确的平移对称性破缺，对偶于具有空间调制化学势的离子晶格。我们专注于微扰研究的边缘模式，驱动过渡到一个阶段表现出自发条纹。我们研究了具有最大临界温度的不稳定性在以化学势调制的周期和振幅为特征的广泛背景下的波矢。我们报告的第一个全息观察的相称锁定之间的自发条纹和底层的离子晶格，这发生在晶格的振幅是足够大的。我们还观察到一个不相称的制度，其中的振幅的晶格是有限的，但优选的条纹波矢量是不同的晶格。
英文摘要：
We consider the spontaneous formation of striped structures in a holographic model which possesses explicit translational symmetry breaking, dual to an ionic lattice with spatially modulated chemical potential. We focus on the perturbative study of the marginal modes which drive the transition to a phase exhibiting spontaneous stripes. We study the wave-vectors of the instabilities with largest critical temperature in a wide range of backgrounds characterized by the period and the amplitude of the chemical potential modulation. We report the first holographic observation of the commensurate lock-in between the spontaneous stripes and the underlying ionic lattice, which takes place when the amplitude of the lattice is large enough. We also observe an incommensurate regime in which the amplitude of the lattice is finite, but the preferred stripe wave-vector is different from that of the lattice.
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