I like how just one year ago Mr Manocha says:
July 9 2013
"GlobalFoundries, Manocha said, is also looking at more-esoteric technologies such as carbon nanowires and a variety of "III-V"* semiconductor materials – so named because they are compounds of group III elements such as aluminum, gallium, and indium with group V elements such as nitrogen, phosphorus, arsenic, and antimony, with one promising combo being gallium arsenide, or GaAs."
I think he puts it pretty clear.