Ultrafast current pulses let scientists push superconductors beyond their usual experimental limits before vortices and heat could interfere.
The method revealed striking differences in how two superconducting materials break down and could expose quantum behavior that conventional measurements miss.
Superconductivity is one of the most remarkable behaviors found in quantum materials. When some materials are cooled below a specific transition temperature, their electrical resistance disappears, allowing current to move through them without losing energy as heat.
This happens because electrons pair up to form what are known as Cooper pairs. These paired electrons move together through the material as part of a coordinated quantum state. That ability makes superconductors valuable for technologies including powerful magnets, highly sensitive detectors, and quantum circuits.
But superconductivity cannot survive unlimited electrical current. If the current becomes too strong, resistance eventually appears, and the superconducting state breaks down. The current level at which this begins is known as the critical current.
To read more, click here.