Category: Condensed matter physics
Dielectric engineering enables cavity-mediated exciton hopping
What the study found The study reports mesoscopic exciton-polariton domains in a structured dielectric exciton environment and an effective long-range exciton hopping in the dispersive regime of cavity-coupling. Why the authors say this matters The authors conclude that these findings are a step toward interacting polaritonic networks and quantum simulations in exciton-polariton lattices based on…
Screening finds 180 materials with significant altermagnetic spin splitting
What the study found The study found 180 materials with significant altermagnetic spin splitting. These materials include both metallic and semiconducting systems, and some representative cases discussed are UCr2Si2C, NbMnP, and YRuO3. Why the authors say this matters The authors say altermagnetism is promising for next-generation spintronics because it can produce sizable spin splitting in…
Light pulses induce near-perfect valley polarization in graphene
What the study found The study reports that a dual-frequency light pulse can induce highly valley polarized states in graphene, a gapless monolayer material in the Xene family. The authors say the result is a near-perfect valley polarized excitation. Why the authors say this matters The authors conclude that this offers a route to lightwave…
Theory predicts trion signatures in ARPES spectra
What the study found The study presents a first theoretical analysis of how trions, or charged excitons, may appear in angle-resolved photoemission spectroscopy (ARPES) spectra of monolayer transition-metal dichalcogenides. It reports that the extra charge carrier changes the spectral position and shape compared with neutral excitons, and that mass-imbalanced trions are predicted to show a…
Domain roughness grows across Mn3NiN phase transition
What the study found Mn3NiN changes from a ferrimagnetic state to a non-collinear antiferromagnetic state with a disordered, dendritic magnetic domain structure. The domain roughness increases on cooling and reaches a fractal dimension of about 1.55 in the non-collinear phase. Why the authors say this matters The authors say that controlling magnetic domain states is…
