In a Weyl semimetal nanosphere, the axion-induced gyrotropic response splits each localized surface plasmon resonance into multiple polarization-dependent modes and allows a transverse electric field to excite quadrupole plasmons.
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Localized surface plasmons in a Weyl semimetal nanosphere
In a Weyl semimetal nanosphere, the axion-induced gyrotropic response splits each localized surface plasmon resonance into multiple polarization-dependent modes and allows a transverse electric field to excite quadrupole plasmons.