URL https://www.researchgate.net/publication/356573270/figure/fig2/AS:1094933700194305@1638063945809/Figure-2a-shows-the-lowest-Bloch-band-k-as-a-function-of-Bloch-wave-vector-k-with_Q320.jpg
URL2 https://www.researchgate.net/figure/Figure-2a-shows-the-lowest-Bloch-band-k-as-a-function-of-Bloch-wave-vector-k-with_fig2_356573270
