Researchers at the University of Illinois have identified a massless particle in the metal strontium ruthenate that can form at any temperature.

The research has been published in the nature magazine last August 9.

In 1956, theoretical physicist David Pines had predicted that another type of plasmon might exist in three-dimensional metals containing more than one kind of charge carrier. This was called a demon.

according to Daily mailcould this ‘demonic particle’ lead to superconductors, consisting of a certain metal or alloy that can transport electricity without resistance. This is used in train levitation and high-precision MRI imaging machines.

Currently, superconductors need to be more than 100F below freezing to conduct electricity without resistance.

The physicist pointed out that it can combine to form a massless particle that does not interact with light.

Superconductivity had already been demonstrated in other elements such as mercury and other materials at low temperatures.

“What makes daemons difficult to detect is their inherent charge neutrality. The out-of-phase currents of the two electron streams cancel out exactly the same, quenching the long-range portion of the Coulomb interaction.

The discovery becomes relevant when Pines explains that there was an exception to the hindrance of plasmons from forming with room-temperature energies. He argued that if the solid has electrons in more than one energy band, these could combine to form a new plasmon. In addition, they can exist at any temperature.

Researchers at the University of Illinois investigated the electronic properties of that metal and by experimenting with it, they discovered the demon that was not in the mainstream.

“The impulse’s dependence on the demon’s intensity confirms its neutral character. Our study confirms a 67-year prediction and indicates that daemons may be a ubiquitous feature of multiband metals.”