At strong coupling (rs around 16 to 28), the nine-moment model predicts that the ion stopping power splits into two peaks and the friction function deviates from linear behavior, a signature of roton-like collective modes.
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Modification of the uniform electron gas polarizational stopping power due to the interaction of the projectile with new collective modes at moderate and strong coupling
At strong coupling (rs around 16 to 28), the nine-moment model predicts that the ion stopping power splits into two peaks and the friction function deviates from linear behavior, a signature of roton-like collective modes.