Tag: 2D Materials and Applications
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…
Multi-Q magnetic order found in twisted WSe2
What the study found The study found previously overlooked types of magnetism in 3.65°-twisted WSe2 at moiré hole filling ν = 1. In part of the phase diagram, the magnetic order parameter varies in space with four non-zero wave vectors, corresponding to the three M-points and one K-point of the moiré Brillouin zone. Why the…