Using light alters superconducting properties

Superconductivity is the physical effect that occurs for some materials at a temperature low enough and a magnetic field small enough, characterized by a zero resistance that leads to a magnetic field degradation (Meissner effect) and is an Quantum statue. In 1911, for the first time, scientists discovered that conductive matter with a completely non-resistive feature called it a superconductor.

At this early stage, a new characteristic of a superconductor was known, that is: if an electric current were to be transmitted into a circuit made of superconducting material, the current would run in it forever without decreasing, because it did not Meet an impedance on the way, meaning that electrical energy is not consumed during the transmission of electricity from one place to another.

In conventional superconductors, superconductivity is created by creating a gravitational force between certain transmission electrons arising from the exchange of photons, causing conduction electrons in the superconductor to manifest the superfluid phase. out of correlated electron pairs. In addition there exists a class of materials, known as extraordinary superconductors, exhibiting superconducting properties but the theoretical opposite physical properties of superconductors alone. In particular, there is a high-temperature superconductor, which has superconductivity at a higher temperature than the usual theory (but is still much lower than room temperature).

Although superconductors bring a lot of practical benefits to humans, making and controlling high-temperature superconductors is always a matter of concern for scientists throughout the two. Decades since it was discovered. Recently, Professor Yoram Dagan of Tel Aviv University's Center for Nano Technology has created a major breakthrough in research by using light to change the properties of superconductors.

His team used a simple approach through a film of superconductors and covered it with a layer of thick organic molecules. When exposed to light, this 50nm organic layer changes the properties of superconductors when organic molecules are stretched and change shape.

He also conducted many tests with different types of organic molecules and obtained three results. For example, an organic substance that increases the standard temperature of a superconductor, the guest raises the standard temperature when exposed to UV light but reduces the temperature under normal light conditions, the other also makes increase superconductor temperature but only when exposed to light. It is clear that the properties of superconductors have changed under the influence of light, which will increase practical applicability.

Superconductors altered by this light are still being studied, so until we can see it with our own eyes, we still have to wait a long time.

Reference: Gizmag