They write about what exactly Yonsei University representatives were able to achieve. Physics of natureTheir experiments provide groundbreaking evidence for the existence of these dark electrons. Previously, it was assumed that they were linked to dark energy in space, but recent results contradict this view.
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The dark energy in question has a hypothetical form. It would exert a negative pressure on the space around us. It could also play a very important role in the workings of the universe, causing it to expand. This phenomenon has long puzzled astronomers, who have had difficulty determining the Hubble constant, the exact rate at which this expansion occurs.
While in the case of ordinary electrons, available spectroscopic techniques can be used to detect them, due to their ability to absorb photon energy, dark electrons pose a much greater challenge. They do not interact with photons or any other electromagnetic forces, which is why current spectroscopic methods do not allow their detection.
Dark electrons would be associated with dark matter, the hypothetical substance driving the expansion of the universe.
What if dark electrons exist not only in space, but also around us? Scientists from South Korea decided to find an answer to this question. Unlike previous experiments that used a single pair of sublattices, the authors of the new research used materials containing two such pairs. In the end, the choice fell on palladium diselenides, cubic superconductors, and lead halide perovskites.
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Using an approach known as ARPES, in which photons hit the surface of a material and cause it to emit electrons, the research team concluded that there was only one type of electron in the materials they studied. Since there were four in total, that meant the remaining three types of electrons did not interact. Request? They had to be in the dark.
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