Uranium Shows Unconventional Superconductivity under High Pressure


Though Uranium is a good conductor of electricity, it shows unconventional superconductivity in certain cases. Scientists in Japan and France have demonstrated a theory explaining an exceptional superconductivity of Uranium in certain form. Physical Review Letters journal published the report.
Superconductors are materials which allow electricity to pass through them with almost zero resistance. This is often at low temperatures reducing the loss of energy.
Triplet superconductivity is a phenomenon where electrons create pairs in the state of parallel spin. In parallel spin, the electrons have same spin in the orbit, either anti-clockwise or clockwise. In this case, the unconventional superconductivity pairs the opposite spin electrons as one. As a result they cancel each other’s spin. 
Scientists Demonstrate a Theoretical Model of UBe13 with Parallel Spin State
The team of researchers figured that on using high magnetic field and pressure, a Uranium-based material, UBe13 demonstrates ‘triplet superconductivity.’ A group of scientists from Tohoku University in Japan and Université Grenoble Alpes in France measured superconductivity of UBe13 under different conditions. The study demonstrated a theoretical model that successfully explains superconductivity. The model consists of electrons forming Cooper pairs with parallel spins.
In the past 100 years, various superconductors were discovered in several metallic systems. However, till date, the examples of perfect triplet superconductivity were very few. Yusei Shimizu, material scientist at Tohoku University pointe out in a statement.
He also stated that study has demonstrated a strong proof of spin triplet superconductivity in Uranium-based material. The experiments took place in low temperatures and high pressure
Triplet superconductivity discovered initially in a few pure metals had a wide range of different systems. Out of these, UBe13 was among the initial discovery of ‘heavy-fermion’ superconductors. Heavy fermion metallic compounds have 1000 times more electrons compared to those in ordinary metals.

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