Giant room-temperature third-order electrical transport in a thin-film altermagnet candidate (opens in new tab)

Quantum geometry, a quantum mechanical quantity comprised of Berry curvature and quantum metric, describes the geometric structure of the electronic bands in solids. The correlation between nontrivial quantum geometry and quantum materials leads to new findings in condensed matter systems. Here we demonstrate that altermagnets, with spontaneously broken time-reversal $$({\mathcal{T}})$$ –half-lattice-translation and parity-time symmetry, host both $${\mathcal{T}}$$ -odd and $${\mathcal{T}}$$ ...