Junctions between dissimilar semiconductors have long attracted the attention of researchers in solid-state physics and electronics. The additional degree of freedom provided by the two materials in the semiconductor heterojunction offers opportunities to pursue new phenomena and applications not possible with homogeneous media. A notable example is the heterojunction injection laser, which, because of its ability to operate continuously at room temperature, has had a great technological impact in areas ranging from optical communications to the compact-disc player.
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Chang et al. (1992) studied this question.
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