Abstract
Abstract Measurements of the optical absorption, the low frequency electrical conductivity and electron spin resonance of reduced LiNbO3, doped with 6 mol% MgO or 7.25 mol% ZnO in the melts, can consistently be interpreted by assuming that free small polarons are present at room temperature, having a polaron stabilization energy EP = 0.5 eV. At 6K the polarons are slightly bound bv ∼ 0.1 eV. caused by unknown defects.
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