I don’t know how to do this on a small scale in a practical way, but I do know that computing machines are very large; they fill rooms. Why can’t we make them very small, make them of little wires, little elements – and by little, I mean little. ~Richard Feynman (1959) As of 2012, the highest transistor count in a commercially available CPU is over 2.5 billion transistors. ~Wikipedia In my article on quantum tunneling, I mistakenly claimed that diodes and transistors made use of this phenomenon. In an effort to correct my mistake, I’m going to explain
band theory
Condensed Matter / Physics / Science And Math
Superconductors and the Valence Band
In the comments for my last post, Hamilton asked the following question: What does the band structure for a superconductor look like? I’m not an expert on this topic, but I thought I’d share what I know. Take it with a grain of salt. I also wanted to warn you all that my site will be going down for maintenance this Sunday. I apologize for the inconvenience. I don’t know if this will affect my regular Sunday post. The current most popular theory of superconductors is BCS theory, which is incomplete. BCS theory says that at extremely low temperatures,