semiconductor-metal transition

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 \(P_{\text{c}}\approx 0.65\ \mathrm{GPa}\) broadens the Sm-5d band to make the band edge cross the Sm-\(4\text{f}^{6}\) level.
  3. A localized-itinerant transition.
  4. A switching transition.
PAC, 1994, 66, 577. 'Definitions of terms relating to phase transitions of the solid state (IUPAC Recommendations 1994)' on page 590 (