REAL SPACE TRANSFER OF TWO DIMENSIONAL ELECTRONS IN DOUBLE QUANTUM WELL STRUCTURES

Abstract

Hot electrons and real space transfer effect in double quantum well structures are studied. It is shown that the electrons in the two wells have the same temperature, but the manner o f the temperature rise depends on the structure. Assuming the parallel conduction in the two channels, the Hall mobility and the electron density in each well are estimated. The electron density in the narrow well isincreased by the field, and the mobility in the wide well i s decreased by the field. The mechnism and the traversal time of the tunneling transition are discussed in terms of the inter-subband matrix elements.