Fig. 3: Evidence of two-dimensional solid helium confined by diamond.
From: Creating two-dimensional solid helium via diamond lattice confinement
a iDPC STEM images (upper) and the corresponding simulated atomic structure (lower) of the pristine diamond viewed along the [011] zone axis. iDPC STEM images (upper) and the corresponding simulated atomic structures (lower) of diamonds containing two-dimensional solid helium viewed from (b) [011], (c) [\(0\bar{1}1\)] and (d) [001] zone axes. Blue arrows highlight helium platelets confined by the diamond lattice. The top and bottom diamond lattices are included in the simulated atomic structures.
