论文标题
jahn-teller耦合到连续模型形式主义的小角度扭曲双层石墨烯中的Moirè声子
Jahn-Teller coupling to moirè phonons in the continuum model formalism for small angle twisted bilayer graphene
论文作者
论文摘要
我们展示了如何在连续模型形式主义中包括\ mo声子与电子的Jahn-Teller耦合，该形式形式形式形式形式描述了小角度扭曲的双层石墨烯。这些声子与山谷的自由度息息相关，能够在充电中性点周围的四个平坦带的大多数整数填充物上张开缝隙。此外，我们得出了电子 - 光子量哈密顿量的完整量子机械表达，这可能允许访问诸如声子介导的超导性和动态Jahn-Teller效应等现象。
We show how to include the Jahn-Teller coupling of \mo phonons to the electrons in the continuum model formalism which describes small-angle twisted bilayer graphene. These phonons, which strongly couple to the valley degree of freedom, are able to open gaps at most integer fillings of the four flat bands around the charge neutrality point. Moreover, we derive the full quantum mechanical expression of the electron-phonon Hamiltonian, which may allow accessing phenomena such as the phonon-mediated superconductivity and the dynamical Jahn-Teller effect.
