Table 2.

Illustrates the sensitivity of flat bands’ valley Chern numbers to the twist angle in tFBL with $D=0.1J$.

Chern number $\left({\mathit{C}}_{\mathit{\mu },\mathit{i}}\right)$	$\theta =2^{\circ }$	$\theta =1.8^{\circ }$	$\theta =1.6^{\circ }$	$\theta =1.5^{\circ }$
${\mathit{C}}_{+,-4}$	0	0	0	0
${\mathit{C}}_{+,5}$	2	2	0	0
${\mathit{C}}_{+,-5}$	− 2	− 2	− 2	− 2
${\mathit{C}}_{+,6}$	− 2	− 2	0	0
${\mathit{C}}_{+,-6}$	2	2	2	2