Quantum fluctuations can actually heat up an electron crystal and make it harder to melt.
April 23, 2026
Original Paper
Melting temperature shifts from quantum fluctuations in generalized Wigner crystals
arXiv · 2604.19870
The Takeaway
Electron crystals usually melt as they get colder because quantum fluctuations shake the structure apart. This new research reveals that these fluctuations can sometimes compete with thermal energy to make the crystal more stable. This flips the general intuition that quantum effects always act as a form of shaking that breaks down order. Understanding this stable state helps physicists design more reliable quantum materials for next-generation computers. It proves that the subatomic world has ways of maintaining order that we are only beginning to find.
From the abstract
It is generally believed that quantum fluctuations collaborate with thermal fluctuations, effectively reducing transition temperatures (e.g. for melting of charge order). We show that this is not always the case and that the interplay between quantum and thermal fluctuations can be competitive. We find excellent motivation for addressing this thanks to the discovery of correlated insulating "generalized Wigner crystal" (GWC) states in hetero-bilayer transition metal dichalcogenide (WS$_2$/WSe$_2