There’s a material that refuses to become a magnet, even though it’s actually packed with more magnetic energy than a real magnet.
April 3, 2026
Original Paper
Suppression of the tendency toward antiferromagnetic order in the Dirac semimetal SrIrO$_3$
arXiv · 2604.02140
The Takeaway
Usually, when a material doesn't order its magnetic particles, its internal magnetic waves are messy and short-lived. This specific metal does the opposite, maintaining incredibly long-lived magnetic signals despite never becoming a magnet, a paradox that current physics can't explain.
From the abstract
The entangled charge and spin dynamics in strongly electron correlated system has been a fruitful playground for exploring new physical phenomena. Here with resonant inelastic X-ray scattering we studied the spin dynamics of SrIrO$_3$, a half-filled paramagnetic semimetal hosting highly itinerant Dirac Fermions due to its topological band structure. Our results show that its magnetic excitations share much similarity to the ordered compounds upon Sn substitution in exchange strength and AFM inst