论文标题
应变诱导的量子相变的魔术角石墨烯
Strain-induced quantum phase transitions in magic angle graphene
论文作者
论文摘要
我们研究了单轴异晶对魔法扭曲双层石墨烯相互作用相图的影响。使用自一致的Hartree fock和密度 - 马可分子重新归一化组计算，我们发现小应变值（$ε\ sim 0.1-0.1-0.2 \％$）驱动对称性旋转的KRAMERS INTEVERLEY-KRAMERS INTEVELLEY-CORENLEY-CORENERLEY-CORYERENERETARE和NEMATIC SEMIATIC SEMIATIC SEMI-SEMI-METAL。临界应变位于实验观察到的应变值的范围内，因此我们预测应变至少部分负责样品依赖性实验观测值。
We investigate the effect of uniaxial heterostrain on the interacting phase diagram of magic-angle twisted bilayer graphene. Using both self-consistent Hartree-Fock and density-matrix renormalization group calculations, we find that small strain values ($ε\sim 0.1 - 0.2 \%$) drive a zero-temperature phase transition between the symmetry-broken Kramers intervalley-coherent insulator and a nematic semi-metal. The critical strain lies within the range of experimentally observed strain values, and we therefore predict that strain is at least partly responsible for the sample-dependent experimental observations.
