direct-gap semiconductor

direct-gap semiconductor

[də¦rekt ¦gap ′sem·i·kən‚dək·tər]
(solid-state physics)
A semiconductor in which the minimum of the conduction band occurs at the same wave vector as the maximum of the valence band, and recombination radiation consequently occurs with relatively large intensity.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
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Heinz, "Atomically thin MoS2: a new direct-gap semiconductor," Physical Review Letters, vol.