Polarons in crystalline and non-crystalline materials
1969/01/01 by I.G. Austin, I. G. Austin, N.F. Mott +1 · 3,079 citations
Chemistry · Materials Science · #Acceptor #Activation energy #Chemistry #Condensed matter physics #Conductivity #Effective mass (spring–mass system) #Electron #Ferroelectric and Piezoelectric Materials #Glass properties and applications #Impurity #Materials science #Non-blocking I/O #Optoelectronics #Physical chemistry #Physics #Polaron #Quantum mechanics #Semiconductor #Thermal conduction #Transition Metal Oxide Nanomaterials
paper · doi:10.1080/00018736900101267
published in Advances In Physics 18(71), 41-102 (Taylor & Francis)
openalex publication_date 1969/01/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/29
Abstract
The current state of polaron theory as applicable to transition metal oxides is reviewed, including problems such as impurity conduction where disorder plays a role. An estimate is given of the conditions under which polaron formation leads to an enhancement of the mass but no hopping energy. The binding energy of a polaron to a donor or acceptor in narrow-band semiconductors is discussed. The experimental evidence about the conductivity of TiO2 and NiO is reviewed. Impurity conduction in NiO and conduction in glasses containing transition metal ions is discussed and it is emphasized that the activation energy for hopping nearly all vanishes at low temperatures. Pollak's theory of a.c. impurity conductivity is reviewed and applied to the problem of dielectric loss in these materials.
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