ELECTRONIC STATES IN GRADED-GAP JUNCTIONS WITH BAND INVERSION

Details ELECTRONIC STATES IN GRADED-GAP JUNCTIONS WITH BAND INVERSION ELECTRONIC STATES IN GRADED-GAP JUNCTIONS WITH BAND INVERSION

1995-05-11

arxiv.org/abs/cond-mat/9505045v1

Physics

Condensed Matter

REVTEX 3.0, 7 pages, no figures, to appear in Phys. Lett. A

Scientific paper

10.1016/0375-9601(95)00363-8

We theoretically study electronic states in graded-gap junctions of IV-VI compounds with band inversion. Using a two-band model within the ${\bf k}\cdot{\bf p}$ approximation and assuming that the gap and the gap centre present linear profiles, we demonstrate the existence of a set of localized states along the growth direction with a discrete energy spectrum. The envelope functions are found to be combination of harmonic oscillator eigenfunctions, and the corresponding energy levels are proportional to the square root of the quantum number. The level spacing can be directly controlled by varying the structure thickness.

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