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

fYear

2007

fDate

2-9 Sept. 2007

Firstpage

869

Lastpage

870

Abstract

We report the complex refractive index of La_5/3Sr_1/3NiO₄ 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;

fLanguage

English

Publisher

ieee

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

Type

conf

DOI

10.1109/ICIMW.2007.4516769

Filename

4516769