Temperature, polarization, and power-dependent photoluminescence of bulk and thin-flake Ni2P2S6 reveals a 1.476 eV exciton with ~117 cm-1 phonon sidebands, ~40% linear polarization, and thickness-dependent survival.
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Exciton dynamics and exciton-phonon coupling in bulk and thin flakes of layered van der Waals antiferromagnet Ni$_2$P$_2$S$_6$
Temperature, polarization, and power-dependent photoluminescence of bulk and thin-flake Ni2P2S6 reveals a 1.476 eV exciton with ~117 cm-1 phonon sidebands, ~40% linear polarization, and thickness-dependent survival.