Title :
Terahertz-frequency conductivity of charge stripes in the antiferromagnet La5/3Sr1/3NiO4
Author :
Lloyd-Hughes, J. ; Prabhakaran, D. ; Castro-Camus, E. ; Boothroyd, A.T. ; Johnston, M.B.
Author_Institution :
Dept. of Phys., Oxford Univ., Oxford
Abstract :
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 6 T 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.
Keywords :
dielectric function; lanthanum compounds; magnetic flux; magnetic permeability; refractive index; strontium compounds; submillimetre wave spectroscopy; LaSrNiO4; charge stripes; charge-ordering temperature; complex refractive index; dielectric function; magnetic flux densities; magnetic permeability; terahertz frequency response; terahertz-frequency conductivity; time-domain spectroscopy; Antiferromagnetic materials; Conductivity; Frequency; Lattices; Magnetic flux density; Refractive index; Spectroscopy; Strontium; Temperature; Time domain analysis;
Conference_Titel :
Infrared and Millimeter Waves, 2007 and the 2007 15th International Conference on Terahertz Electronics. IRMMW-THz. Joint 32nd International Conference on
Conference_Location :
Cardiff
Print_ISBN :
978-1-4244-1438-3
DOI :
10.1109/ICIMW.2007.4516769
