论文标题
自旋磁力测定法作为扭曲双层石墨烯中条纹超导的探针
Spin magnetometry as a probe of stripe superconductivity in twisted bilayer graphene
论文作者
论文摘要
在Magic Angle石墨烯中发现交替的超导和绝缘地面，这表明了与Cuprate High $ T_C $材料的有趣类比。在这里，我们认为，小角度扭曲的双层石墨烯（TBG）的网络状态通过模拟其条纹订购的阶段，为库酸盐提供了进一步的观点，例如la $ _ {1.875} $ ba $ _ {0.125} $ _4 $ _4 $ _4 $ _4 $。我们表明，TBG石墨烯中条纹的旋转和山谷量子数分数化，在状态的隧道密度和杂质自旋的磁噪声频谱中产生特征特征。通过检查电荷河流之间的耦合，我们确定了超导过渡温度。我们的研究表明，魔术角石墨烯可用于控制突出的任何人激发的条纹超导性和量子传感实验。
The discovery of alternating superconducting and insulating ground-states in magic angle graphene has suggested an intriguing analogy with cuprate high-$T_c$ materials. Here we argue that the network states of small angle twisted bilayer graphene (TBG) afford a further perspective on the cuprates by emulating their stripe-ordered phases, as in La$_{1.875}$Ba$_{0.125}$CuO$_4$. We show that the spin and valley quantum numbers of stripes in TBG graphene fractionalize, developing characteristic signatures in the tunneling density of states and the magnetic noise spectrum of impurity spins. By examining the coupling between the charge rivers we determine the superconducting transition temperature. Our study suggests that magic angle graphene can be used for a controlled emulation of stripe superconductivity and quantum sensing experiments of emergent anyonic excitations.
