论文标题
LAALO3/SRTIO3杂气方面的超导性理论：由铁弹性结构壁的变形介导的电子配对
Theory of Superconductivity at the LaAlO3/SrTiO3 heterointerface: Electron pairing mediated by deformation of ferroelastic domain walls
论文作者
论文摘要
srtio $ _3 $是一种超导体的半导体，其配对机制尚不清楚。 Srtio $ _3 $在$ t = $ 105 K处进行铁弹性过渡，从而形成了域的域，边界可以将它们与电子属性搭配在一起。在二维SRTIO $ _3 $接口处，这些铁弹性域的方向将逐渐融合到电子密度，从而导致富含电子的区域，这些区域有利于平面外变形和有利于电子贫乏的区域，这些区域有利于平面畸变。在这里，我们表明，铁弹性结构域壁支持低能激励，这些激励类似于两个流体的界面处的毛细管波。我们建议这些毛细管波介导Laalo $ _3 $/srtio $ _3 $接口的电子配对，从而在富含电子区域的边缘周围产生超导性。这种机制与Pai等人报告的最新实验结果一致。 [prl $ \ bf {120} $，147001（2018）]
SrTiO$_3$ is a superconducting semiconductor with a pairing mechanism that is not well understood. SrTiO$_3$ undergoes a ferroelastic transition at $T=$ 105 K, leading to the formation of domains with boundaries that can couple to electronic properties. At two-dimensional SrTiO$_3$ interfaces, the orientation of these ferroelastic domains is known to couple to the electron density, leading to electron-rich regions that favor out-of-plane distortions and electron-poor regions that favor in-plane distortion. Here we show that ferroelastic domain walls support low energy excitations that are analogous to capillary waves at the interface of two fluids. We propose that these capillary waves mediate electron pairing at the LaAlO$_3$/SrTiO$_3$ interface, resulting in superconductivity around the edges of electron-rich regions. This mechanism is consistent with recent experimental results reported by Pai et al. [PRL $\bf{120}$, 147001 (2018)]
