Patent ID: 7045815

Claim:
A semiconductor structure exhibiting reduced leakage current comprising: a monocrystalline silicon substrate; an amorphous oxide material in contact with the monocrystalline silicon substrate; and a strained-layer heterostructure overlying said substrate, said heterostructure having: a first layer comprising a first monocrystalline oxide material having a first lattice constant selected from the group consisting of alkaline earth metal titanates, alkaline earth metal zirconates, alkaline earth metal hafnates, alkaline earth metal tantalates, alkaline earth metal ruthenates, alkaline earth metal niobates, alkaline earth metal vanadates, alkaline earth metal tin-based perovskites, lanthanum aluminate, lanthanum scandium oxide, gadolinium oxide and mixtures thereof contacting the amorphous oxide material; and a second layer comprising a second monocrystalline oxide material overlying said first layer and having a second lattice constant, wherein said second lattice constant is different from said first lattice constant, wherein a strain is effected at least at one of an interface of said strained layer heterostructure and said substrate, an interface between said first layer and said second layer, and within said first layer and said second layer, and wherein said substrate comprises a (001) semiconductor material having an orientation from about 2 degrees to about 6 degrees offset toward the (110) direction.