Hundreds of people on a dance floor stand at equal distances from each other — strict order, like in a crystal lattice. Slow music is thermal vibrations, making dancers sway slightly. If the music gets louder and faster, order collapses: everyone mixes. That's how thermal motion destroys ordered states of electrons in solids.
But electrons also have their own trembling — quantum, independent of temperature. Previously, it was thought that these quantum jitters always help heat destroy order, lowering the melting temperature. In the new work, they studied a system where electrons in a bilayer material of transition metal dichalcogenides (WS₂/WSe₂) form a so-called generalized Wigner crystal — an ordered pattern, like frozen figures on a dance floor. And it turned out: quantum jitters don't weaken but strengthen this order.
Physicists performed numerical calculations on a triangular lattice using the extended Hubbard model. They saw: when electrons get more freedom to hop between sites (the band width grows), their collective quantum motion doesn't blur the crystal but stabilizes it at higher temperatures. This is like dancers who, holding hands, can withstand faster music than alone.
Such an unexpected effect could be tested in experiments where the band width is controlled by electric fields or strain on the sample. Perhaps this is the key to creating materials with switchable quantum order — from insulator to conductor with a flick of voltage. And then the dance floor where figures hold together despite loud music becomes not just a metaphor but a working blueprint for future electronics.
The generalized Wigner crystal was first predicted by Eugene Wigner in 1934 for electrons in a dilute gas, but it was observed experimentally only in 2020 in layered materials with moiré patterns.
In the novel 'Blindsight' by Peter Watts, alien creatures use quantum effects to stabilize their consciousness — almost like electrons in a crystal that prevent heat from destroying order.