论文标题
超导性，相关的绝缘子和扭曲双层石墨烯中的wess-zumino术语
Superconductivity, correlated insulators, and Wess-Zumino-Witten terms in twisted bilayer graphene
论文作者
论文摘要
在扭曲的双层石墨烯上进行的最新实验显示了一个高温母体状态，具有无质量的狄拉克费米和破碎的电子风味对称性。在较低温度下，超导性和相关的绝缘子从该母体状态出现。我们提出，超导和相关的绝缘顺序通过wess-zumino-onginenter术语连接，因此一个顺序的缺陷包含另一个顺序的量子，相关绝缘子的skyrmion波动是超导性的“机制”。我们介绍了合理的低温订单以及父母风味对称性的破坏订单的全面列表。扭曲双层石墨烯的带状结构的先前表征性质在此分析中起着重要作用。
Recent experiments on twisted bilayer graphene have shown a high-temperature parent state with massless Dirac fermions and broken electronic flavor symmetry; superconductivity and correlated insulators emerge from this parent state at lower temperatures. We propose that the superconducting and correlated insulating orders are connected by Wess-Zumino-Witten terms, so that defects of one order contain quanta of another order and skyrmion fluctuations of the correlated insulator are a "mechanism" for superconductivity. We present a comprehensive listing of plausible low-temperature orders, and the parent flavor symmetry breaking orders. The previously characterized topological nature of the band structure of twisted bilayer graphene plays an important role in this analysis.
