Spin is the spin-related internal property that electrons possess, and it is spin that makes the material within a magnet magnetic. In some materials, spin can cause structural disorder, similar to molecules in a liquid, hence the term “spin liquid”. The main characteristic of spin liquids is that they remain disordered even when cooled to absolute zero (minus 273 degrees Celsius), because the spin direction continues to fluctuate as the material cools, rather than being stable in the solid state like conventional magnets down (in a conventional magnet, all spins are aligned).
Think of an electron as a small compass that points up or down, the researchers explained. In conventional magnets, the electron spins all point in the same direction, up or down, forming what’s called a “ferromagnetic phase.” But inside quantum spin liquids, electrons are placed in a triangular lattice, forming triangles characterized by intense turbulence that disturb their order, and the result is an entangled wavefunction with no magnetic order.
“When a third electron is added, the electron spins cannot be aligned, because the spins of the two adjacent electrons are opposite, which creates the What we call a magnetoresistive setback. And this ground state that produces excitations, even at very low temperatures, maintains the disorder of the spins and thus maintains the liquid state.”
Bianchi said that Ce2Zr2O7 is a magnetic cerium-based material. Scientists have made this compound before. The new study made it in a unique pure form, using samples melted in an optical furnace. almost finishedbeautifulTriangular arrangement of atoms, then examine the quantum state. It turned out that it was this near-perfect triangle that allowed them to create a magnetoresistive foil in Ce2Zr2O7.
“Our measurements show that the particle functions overlap, so there is no clear sign of classical magnetic order,” Bianchi said. “In addition, we observed a distribution of constantly fluctuating spin directions, which is characteristic of spin liquids and magnetoresistances. , suggesting that the material we created behaves like a true spin liquid at low temperatures.”
After confirming these observations with computer simulations, the team concluded that they had indeed observed a never-before-seen quantum state — the quantum spin liquid ground state.