SUPERCONDUCTING wires allow electricity to flow with zero resistance, as long as their temperature is below at least -123 °C. That’s a major obstacle, but does the whole of the wire have to be that cold?
The answer may be no, according to and of the University of California, San Diego. They have calculated that provided some points along the wire’s length stay below the threshold temperature, the material will superconduct.
For this to work, the wire’s surface must be extremely clean, allowing electrons to move freely and spread along the wire to create…
