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Spin-Peierls transition in CuGeO3: Electron paramagnetic resonance study

  • Author(s): Oseroff, S;
  • Cheong, SW;
  • Fondado, A;
  • Aktas, B;
  • Fisk, Z
  • et al.

Published Web Location

https://doi.org/10.1063/1.356818Creative Commons 'BY' version 4.0 license
Abstract

Measurements of electron paramagnetic resonance (EPR) at 9 and 35 GHz between 2 and 300 K in single crystals and powder samples of CuGeO3 are presented. Below 14 K a large decrease in the intensity of the Cu 2+ EPR signal is observed. The data can be interpreted as due to a spin-Peierls transition. However, an alternative interpretation in terms of a simple structural transition cannot be ruled out. An opening of an energy gap of ∼25 K is calculated from the analysis.

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