Preferred Label : surface states; 
IUPAC definition : Energy levels localized in the surface region of semiconductors, which do not bear
               any direct relation to the bulk energy distribution, but which can exchange electrons
               with the bulk. In such a case a space charge may arise even when σ (the free charge
               density) is zero, i.e. σ   σ sc   σ ss, where σ sc is the space charge density and
               σ ss is the charge density associated with the surface states.; 
         
         
            Origin ID : S06190; 
 Automatic exact mappings (from CISMeF team) Automatic exact mappings (from CISMeF team)
 See also See also
 
         
         
         Energy levels localized in the surface region of semiconductors, which do not bear
            any direct relation to the bulk energy distribution, but which can exchange electrons
            with the bulk. In such a case a space charge may arise even when σ (the free charge
            density) is zero, i.e. σ   σ sc   σ ss, where σ sc is the space charge density and
            σ ss is the charge density associated with the surface states.