We present a new technique for inducing anomalous nuclear effects in solid systems. The key factor of this method is to place thin film oxides on a surface of deuteron‐loaded palladium (Pd:D) plate. The oxides provide the surface barriers for ionic transport of deuterons. The controlled out‐transport of deuteron atoms then produces D accumulation layers at the Pd surfaces. By using this ‘‘surface‐barrier’’ technique, we have observed gigantic neutron bursts of (1–2×106n/s, explosive gas release, uniform biaxial bending caused by plastic deformation, and excess heat evolution, all at the same time, from oxide/Pd:D/Au systems set in a vacuum chamber. We have also observed the latter three phenomena by applying this method to Pd:H systems having the same heterostructures. This is the first evidence for the fact that the excess heat production is not caused by D–D reactions.