Terahertz-frequency conductivity of charge stripes in the antiferromagnet La5/3Sr1/3NiO4

We report the complex refractive index of La5/3Sr1/3NiO4 over the terahertz frequency range, obtained using time-domain spectroscopy. Negligible change in the complex refractive index with magnetic flux densities up to 6T was seen, while changes were observed as the lattice temperature was increased...

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Κύριοι συγγραφείς: Lloyd-Hughes, J, Prabhakaran, D, Castro-Camus, E, Boothroyd, A, Johnston, M, IEEE
Μορφή: Conference item
Έκδοση: 2007
Περιγραφή
Περίληψη:We report the complex refractive index of La5/3Sr1/3NiO4 over the terahertz frequency range, obtained using time-domain spectroscopy. Negligible change in the complex refractive index with magnetic flux densities up to 6T was seen, while changes were observed as the lattice temperature was increased from 1.5 K to the charge-ordering temperature at 220 K. The terahertz frequency response therefore originates from the dielectric function rather than the magnetic permeability.