Double dimensional crossovers of nonclassical conductivity

Dimensional crossovers of nonclassical conductivity have been observed going from 1D to 2D and from 2D to 3D in bulk n-${\mathrm{Hg}}_{0.8}$${\mathrm{Cd}}_{0.2}$Te for the first time. Various samples of micron dimensions were studied at relative high temperatures between 1.4 and 30 K. Dimensional crossovers were provoked by changing the sample temperature. In this narrow-gap semiconductor, with an extremely small effective mass, the nonclassical conductivity is related to electron-electron interaction.