Superconductors are remarkable materials that may look plain at ambient conditions, but when cooled to very low temperature levels, permit electrical current to stream with absolutely no resistance. There are numerous obvious applications of superconductivity, such as lossless energy transmission, but the physics underlying this process is still not clearly comprehended. The established method of thinking of the transition from typical to superconducting is called the Bardeen-Cooper-Schrieffer (BCS) theory. In this model, as long as thermal excitations are kept small enough, particles can form “Cooper sets” which take a trip together and resist scattering. However, the BCS model does not properly discuss all types of superconductors, which limits our ability to develop more robust superconducting materials that operate at space temperature.
Now, a researcher from the University of Tsukuba has actually developed a new model for superconductivity that much better exposes the physical concepts. Rather of focusing on the pairing of charged particles, this brand-new theory uses the mathematical tool called the “Berry connection.” This value computes a twisting of area where electrons take a trip. “In the basic BCS theory, the origin of superconductivity is electron pairing. In this theory, the supercurrent is identified as the dissipationless circulation of the paired electrons, while single electrons still experience resistance,” Author Professor Hiroyasu Koizumi states.
Commonly used in high-precision magnetic field detectors and quantum computers, Josephson junctions also do not fit nicely the within BCS theory. “In the brand-new theory, the function of the electron pairing is to stabilize the Berry connection, as opposed to being the cause of superconductivity by itself, and the supercurrent is the flow of single and paired electrons produced due to the twisting of the space where electrons travel triggered by the Berry connection,” Professor Koizumi says.
Recommendation: “Superconductivity by Berry Connection from Many-body Wave Functions: Revisit to Andreev − Saint-James Reflection and Josephson Effect” by Hiroyasu Koizumi, 5 July 2021, Journal of Superconductivity and Novel Magnetism.DOI: 10.1007/ s10948-021-05905-y.
A scientist from the Division of Quantum Condensed Matter Physics at the University of Tsukuba has created a brand-new theory of superconductivity. Now, a researcher from the University of Tsukuba has actually come up with a new model for superconductivity that much better reveals the physical concepts. “In the new theory, the role of the electron pairing is to support the Berry connection, as opposed to being the cause of superconductivity by itself, and the supercurrent is the flow of paired and single electrons generated due to the twisting of the area where electrons travel triggered by the Berry connection,” Professor Koizumi says.
A scientist at the University of Tsukuba introduces a brand-new theoretical model of high-temperature superconductivity, in which electrical current can stream with zero resistance, which may lead to very efficient energy generation and transmission.
A researcher from the Division of Quantum Condensed Matter Physics at the University of Tsukuba has actually formulated a brand-new theory of superconductivity. Based upon the calculation of the “Berry connection,” this model helps describe brand-new speculative outcomes much better than the existing theory. The work may permit future electrical grids to send out energy without losses.
