Extended Data Fig. 9: Calculated exchange parameters.
From: Gate-tunable room-temperature ferromagnetism in two-dimensional Fe3GeTe2
a, The top view shows Jin1 to Jin6 for the intralayer (in plane) coupling. b, The side view shows Jz1 to Jz4 for the interlayer (out of plane) coupling. Only Fe ions are shown in the structure. The purple and red atoms are FeI and FeII ions, respectively. c, The left column shows the calculated exchange parameters for bulk FGT, Jini for intralayer and Jzi for interlayer, in a 3 × 3 × 1 bulk supercell. The right column shows the spin exchange parameters in a monolayer 3 × 3 × 1 supercell, denoted as Jxxi (Jyyi) and Jzzi. The units of J are millielectronvolts. The results indicate that the exchange coupling J is largely isotropic.
