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Density-wave phases of dipolar fermions in a bilayer

机译:双层中偶极费米子的密度波相位

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045110-1%We investigate the phase diagram of dipolar fermions with aligned dipole moments in a two-dimensional (2D) bilayer. Using a version of the Singwi-Tosi-Land-Sjolander scheme recently adapted to dipolar fermions in a single layer [M. M. Parish and F. M. Marchetti, Phys. Rev. Lett. 108, 145304 (2012)], we determine the density-wave instabilities of the bilayer system within linear response theory. We find that the bilayer geometry can stabilize the collapse of the 2D dipolar Fermi gas with intralayer attraction to form a new density wave phase that has an orientation perpendicular to the density wave expected for strong intralayer repulsion. We thus obtain a quantum phase transition between stripe phases that is driven by the interplay between strong correlations and the architecture of the low-dimensional system.
机译:045110-1%我们研究了二维(2D)双层中偶极矩对齐的偶极费米子的相图。使用Singwi-Tosi-Land-Sjolander方案的一种版本,该方案最近适用于单层中的偶极费米子[M. M. Parish和F.M. Marchetti,物理学牧师108,145304(2012)],我们在线性响应理论中确定了双层系统的密度波不稳定性。我们发现双层几何结构可以稳定具有层内吸引力的二维偶极费米气体的塌陷,从而形成新的密度波相,该相的方向垂直于期望强层内排斥的密度波。因此,我们得到了条纹相之间的量子相变,这是由强相关性和低维系统的体系结构之间的相互作用驱动的。

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