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Title: Electronic excitations and structure of Li{sub 2}IrO{sub 3} thin films grown on ZrO{sub 2}:Y (001) substrates

Thin films are a prerequisite for application of the emergent exotic ground states in iridates that result from the interplay of strong spin-orbit coupling and electronic correlations. We report on pulsed laser deposition of Li{sub 2}IrO{sub 3} films on ZrO{sub 2}:Y (001) single crystalline substrates. X-ray diffraction confirms preferential (001) and (10-1) out-of-plane crystalline orientations with well defined in-plane orientation. Resistivity between 35 and 300 K is dominated by a three-dimensional variable range hopping mechanism. The dielectric function is determined by means of spectroscopic ellipsometry and, complemented by Fourier transform infrared transmission spectroscopy, reveals a small optical gap of ≈300 meV, a splitting of the 5d-t{sub 2g} manifold, and several in-gap excitations attributed to phonons and possibly magnons.
Authors:
; ; ;  [1]
  1. Institut für Experimentelle Physik II, Universität Leipzig Linnéstraße 5, D-04103 Leipzig (Germany)
Publication Date:
OSTI Identifier:
22412845
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Applied Physics; Journal Volume: 117; Journal Issue: 2; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; DIELECTRIC MATERIALS; ELECTRIC CONDUCTIVITY; ELLIPSOMETRY; ENERGY BEAM DEPOSITION; EXCITATION; FOURIER TRANSFORMATION; GROUND STATES; INFRARED SPECTRA; IRIDIUM OXIDES; LITHIUM COMPOUNDS; L-S COUPLING; MAGNONS; MONOCRYSTALS; PHONONS; PULSED IRRADIATION; TEMPERATURE DEPENDENCE; THIN FILMS; THREE-DIMENSIONAL LATTICES; X-RAY DIFFRACTION; ZIRCONIUM OXIDES