Electronic transport and cyclotron resonance in 2H-PbI<sub>2</sub>
P D Bloch; J W Hodby; T E Jenkins; D W Stacey; G Lang; F Levy; C Schwab; P D Bloch; Clarendon Lab., Univ. of Oxford, Oxford, UK; J W Hodby; Clarendon Lab., Univ. of Oxford, Oxford, UK; T E Jenkins; Clarendon Lab., Univ. of Oxford, Oxford, UK; D W Stacey; Clarendon Lab., Univ. of Oxford, Oxford, UK; G Lang; Clarendon Lab., Univ. of Oxford, Oxford, UK; F Levy; Clarendon Lab., Univ. of Oxford, Oxford, UK; C Schwab; Clarendon Lab., Univ. of Oxford, Oxford, UK
Журнал:
Journal of Physics C: Solid State Physics
Дата:
1978-12-24
Аннотация:
Photoexcited electrons and holes in 2H-PbI<sub>2</sub> are studied by measurements of the Hall effect magnetoconductivity and cyclotron resonance. Transport by holes is dominant below 20K under long-wavelength illumination. Electron transport is dominant under white light illumination below 20K and under all illumination conditions above 20K. Hole mobility is anisotropic with 2< mu <sub>perpendicular to c</sub>/ mu /sub //c/<4. The mobility of electrons above 30K, when limited by optical phonon scattering may be fitted by an effective band mass of 0.55 m<sub>0</sub> where m<sub>0</sub> is the mass of the free electron. Cyclotron resonance at 137 GHz gives a polaron mass m/sub ///m<sub>perpendicular to </sub>)<sup>1</sup>2/=(0.68+or-0.16)m<sub>0</sub>, or a band mass (m<sub>b</sub>//m<sub>b perpendicular to </sub>)<sup>1</sup>2/=(0.46+or-0.15)m<sub>0</sub>.
382.1Кб