Phase boundary of dilute lattice spin glasses

Based on a recently developed algorithm for the exploration of ground states in bond-diluted lattice spin glasses, we determine the scaling of defect energies with system size for Ising spin glasses at the bond percolation threshold pc. The results can be related by well-known scaling relations to the shape of the transition temperature Tg∼(p-pc)φ between the paramagnetic and glassy regime for p→pc. The numerical results in three dimensions are consistent with rather old experimental data for (FexNi1-x)75P16B6A3, suggesting that new experimental work may be able to put those numerical predictions to the test.