Much larger resonant tunneling effects were observed over 20 years ago in III-V heterostructure devices at room temperature. This is a slightly interesting resu

Much larger resonant tunneling effects were observed over 20 years ago in III-V heterostructure devices at room temperature. This is a slightly interesting result, but the supposed implications are just your typical research marketing. Tunneling devices do show promise as switches, but, as far as I am aware, no one has successfully commercialized such a switch in the over 20 years the possibility has been known. Unless you count the Zener diode, I suppose... but they aren't particularly useful for logic.