Novel trap state at the grain boundary: Metastable character of defects in p-HgMnTe and p-HgCdMnTe bicrystals

Abstract
The existence of the novel trap state in bicrystals of narrow-gap semiconductors is clearly demonstrated. It is shown that this state exhibits metastable character and its origin is related to the grain boundary. A method of tuning the concentration and mobility of electrons by means of the high-pressure freezeout of carriers on these metastable states has been applied to study two-dimensional properties of the grain boundaries in HgMnTe and HgCdMnTe semimagnetic semiconductors.