Galvanomagnetic and thermoelectric properties of p-Hg_1-xCd_xTe (x ≈ 0.22)

摘要

Measurements of the Hall coefficient R_H, conductivity σ and Seebeck coefficient a are reported on undoped p-Hg_1-xCd_xTe (x ≈ 0.22) at temperatures 4.2-300 K. The electronic Boltzmann transport equation was solved and the subsequent fitting procedure gave a very good agreement between the experiment and calculation. The measurements were analysed in the full temperature interval using the same model parameters in the impurity, intrinsic and intermediate region. Two shallow acceptor levels at ≈5 and 9 meV and effective hole mass 0.6m_0 have been recommended for describing R_H and σ at temperatures 10-50 K. Useful relations between the typical features of the transport coefficients were demonstrated and the precision of model parameters determined by this procedure was analysed.