ქიმიის ტერმინთა განმარტებითი ლექსიკონი

Any transition from a semiconductor to a metallic state under the influence of a temperature or pressure change or both. Examples:

1. Ti₂O₃: band-edge crossing in a semiconductor to semimetal transition.
2. SmS: localized level crossing a band edge. In SmS hydrostatic pressure above the critical pressure P_c ≈ 0.65 GPa broadens the Sm-5d band to make the band edge cross the Sm-4f⁶ level.
3. A localized-itinerant transition.