Assertion: semiconductor's electron | /r/CapableOf | form barrier
Facets:
value: at the surface of certain crystals
type: LOCATION
value: under the right circumstances
type: TEMPORAL
Source sentences:
text: Shockley’s team (including John Bardeen and Walter H. Brattain) found that, under the right circumstances, electrons would form a barrier at the surface of certain crystals, and they learned to control the flow of electricity through the crystal by manipulating this barrier.