"Superconductivity" refers to superconductivity, that is, current can pass through a substance with zero resistance and is completely diamagnetic. In the past research, superconducting materials generally appeared at-100 degrees Celsius or1000000 atmospheric pressure. Room temperature superconductivity is to realize superconductivity at room temperature. The scientific community believes that the first breakthrough of room temperature superconductivity is a Nobel Prize-level achievement.
In this incident, the Korean research team published two articles, both of which were published on the pre-printed website arXiv without peer review. The last time the team made a statement was in the early morning of July 3 1. Hyun-Tak Kim, a member of the team and a professor of physics at William and Mary College in the United States, said that his team had previously discovered a mistake in the paper, which has now been revised and will be reissued soon.
In addition, the room temperature superconducting material manufactured by his team may be copied within one month, and his members will also give guidance on the production method, which will be disclosed in the article, just to accept questions from all sides. However, in the opinion of experts, the condition that the temperature under normal pressure proposed by the Korean team is lower than 127℃ is difficult to convince before the exact recurrence conclusion appears.
Why humans are so eager for room temperature superconductivity;
This is related to the characteristics of superconductors and their broad application prospects. Superconductor is a superconducting material. As a conductor, it can ensure zero resistance at a specific temperature, has the characteristics of zero resistance and complete diamagnetism, and can be widely used in energy storage, maglev train, power transmission, nuclear magnetic resonance and other fields.
Taking the maglev train as an example, Japan's low-temperature superconducting magnetic levitation technology uses superconducting materials to make superconducting coils. By installing a refrigerator on the carriage, the superconducting coils can be guaranteed to be in a low-temperature superconducting state.
At this time, when the current is transmitted through the conductor, the conductor does not generate heat and there is almost no loss of current, but the magnetic force generated by electrification can keep the train suspended and move forward. However, the ultra-low temperature required for superconductivity has become a pain point for the popularization of related technologies.