The Kagome superconductor CsV 3 Sb 5 was observed for the first time by an international research team. Their work was published in nature.
The consequences of an object being indistinguishable from its mirror image are important. A basketball player is in a mirror The ball, the player and their surroundings are the same as in real life. Some details are not the same. There is a ball in the player's right hand and a ball in the player's left hand. The mirror image shows the same hand, but it has changed from a left to a right one. Scientists call them handed or chiral because they have mirror images that differ in a key aspect. The ball can't be distinguished from the mirror image of others.
One of the most fundamental geometric properties is chrality, which is used in biology, chemistry and physics. One version of the carvone molecule can produce a spearmint smell, but it also has the same smell of caraway.
The periodic arrangement of the atoms in a crystal can be different from the other way around. If it is, the electrons and electric currents flowing within it must be different from their mirror image, a property that can lead to novel applications. The electric currents flowing from left to right are different from the electric currents flowing from right to left. This phenomenon has only been found in certain types of crystal.
The first observation of this transport in a crystal has been made by an international research team. The team was made up of scientists from Germany, Switzerland, Spain, and China.
If the atomic positions in the crystal are the same as in the mirror image, how is it that the electrons are different? Our hands must be at play in a novel mechanism. Magnetic fields can be used to switch electronic chirality, which is similar to structural chirality in that it is imprinted in a crystal. It is possible that switchable chirality will find its application in the future.
This behavior is linked to the electronic interactions. Even though the atoms are arranged symmetrically, the electrons are arranged in patterns that violate mirror symmetry.
CsV 3 Sb 5 is well-known for interacting electronic structures such as the formation of an unconventional charge order. A behavior known as "loop currents" can be caused by the rotation of these electronic structures.
CsV 3 Sb 5 seems to be a great place to investigate correlated quantum phenomena. Enhancement of the magnitude of this response will be the next step. It's clear that much more is to come from interacting systems.
More information: Chunyu Guo et al, Switchable chiral transport in charge-ordered kagome metal CsV3Sb5, Nature (2022). DOI: 10.1038/s41586-022-05127-9 Journal information: Nature
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