Isnt that just
a four layer diode? voltage mode negative resistance?
Just build it in GaP and you'll have a solid state 'Neon' :-)
Hmmm, you may be onto something. Let's see, where did I put my bar of
gallium and tank of phosphine? :)
You have a bar of Gallium? Wouldn't it slowly turn into a blob on hot days?
Peace... Sridhar