Fig. 6: Simulated STM images using optimized exponents for Slater orbitals.
From: Scanning tunneling microscopy of buried dopants in silicon: images and their uncertainties

The left image (a) uses only the optimised exponent for s* while the (b) image additionally uses the optimised exponent for px and py. The additional black-bordered picture (P-1-Exp) representing the actual experimental data has been reprinted from ref. 3 (with courtesy from Springer Nature) for comparison.