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Scientists have found a new “strange metal” that behaves in an unusual way, but this may be the key to explaining a phenomenon that has plagued researchers for decades, which could potentially lead to various discoveries such as lossless power grids and quantum computers.
Most materials, such as copper and silver, behave in a predictable and well-understood way, and scientists know how their electrical conductivity changes when heated or cooled.
But recently, scientists have focused on another class of materials, known as strange metals, which do not conform to common electrical rules.
In material the electric charge is not carried by electrons, as usual, but by so-called Cooper pairs, which look more like waves. Electrons are part of a class of fermion particles, and Cooper pairs are bosons that behave quite differently.
The strange behavior of metal has never been seen in a boson system and it can help solve the mystery of decades.
“We have these two fundamentally different types of particles, the behavior of which is mysterious. This suggests that any theory explaining the strange behavior of metals may not be specific to every type of particle. It has to be more essential than thatSaid James Wells, a professor of coffee physics and author of the new study, which was published in the journal Nature.
The strange behavior of metals has puzzled scientists for 30 years, after it was discovered that a class of materials called cuprates do not behave like other metals. When normal metals heat up, their resistance increases, to a certain point when high temperatures mean that the resistance becomes constant – but this does not happen with copper and the strange metals refuse to obey the rules.
Researchers assume that this is related to two different constants: one, which refers to the energy produced by thermal motion, and the Planck constant, which refers to the energy of a particle of light.
““To understand what is going on in these strange metals, people have used mathematical approaches similar to those used to understand black holes.” said Wells adding it’s talking about some of the basic physics processes that are happening here.
To better understand why this happens, the scientists used cup material that had small holes to produce Cooper pairs. They cooled it and saw the change in its conductivity – and discovered that it behaved like strange fermion metals./ KosovaPress
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