Seebeck Effect and Giant Linear Magnetoresistance Affected by Conflicting n‐ and p‐Type Defect‐Induced Doping in Epitaxial Bi₂Te₃ Layers

Bismuth telluride films grown by hot wall epitaxy exhibit p-type conduction in the temperature window for optimum growth while n-type conduction otherwise takes place. The sign of the Seebeck coefficient changes correspondingly when the growth temperature is varied. Unsaturated linear magnetoresistance of giant magnitudes appears furthermore at the transitions associated with the conduction type change.