Raman measurements on Sr<sub>2</sub>IrO<sub>4</sub> grown in magnetic field
ORAL
Abstract
Recent experiments found a massive reduction in the low-temperature resistivity in Sr2IrO4 when the crystals were grown in the presence of a magnetic field. Here I will present a comparison of Raman scattering data from normal and field-grown Sr2IrO4. The main differences between the two appeared in scattering from magnetic excitations. Two-magnon scattering was significantly broader in the field-grown sample and exhibited unusual temperature dependence. Scattering from single magnons, clearly visible in the normal sample, was completely absent in the field-grown sample down to an energy of at most 5 cm-1. Latest results including on doped samples will be presented.
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Presenters
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Nick Pellatz
University of Colorado, Boulder, Physics, University of Colorado, Boulder
Authors
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Nick Pellatz
University of Colorado, Boulder, Physics, University of Colorado, Boulder
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Dmitry Reznik
University of Colorado, Boulder, University of Colorado at Boulder, Physics, University of Colorado, Boulder
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Gang Cao
University of Colorado, Boulder, Department of Physics, University of Colorado at Boulder, Physics Department, University of Colorado Boulder, Physics, University of Colorado, Boulder, University of Colorado at Boulder, Physics, University of Colorado Boulder