Figure 1
Constant energy contours for SrMnBi2 and CaMnBi2 measured at 30 K.
(a) and (b) show the Bi square net sandwiched between two Sr layers in SrMnBi2 and two Ca layers in CaMnBi2 in their crystal strucrure35. (c1–c5). Constant energy contours of SrMnBi2 obtained by integrating the photoemission spectral weight over a 10 meV energy window with respect to the binding energy of 0 (c1), 50 meV (c2), 100 meV (c3), 150 meV (c4) and 200 meV (c5). The crystal structure of SrMnBi2 is tetragonal with a space group of I4/mmm and a lattice constant of a = 4.58 Å35. (d1–d5). Constant energy contours of CaMnBi2 obtained by integrating the photoemission spectral weight over a 10 meV energy window with respect to the binding energy of 0 (d1), 50 meV (d2), 100 meV (d3), 150 meV (d4) and 200 meV (d5). The crystal structure of CaMnBi2 is tetragonal with a space group of P4/nmm and a lattice constant of a = 4.50 Å35. All the contours are obtained by symmetrizing the original data with respect to the (π,−π)-(−π,π) line.
