DOI > 10.5291/ILL-DATA.5-53-291

This proposal is publicly available since 02/02/2026

Title

Possible octupolar phase in oxychlorine copper oxide

Abstract

Optical second harmonic generation (SHG) is a very powerful and sensitive technique to unveil novel and hidden phases in various compounds with strongly correlated electron systems. Nowadays, SHG studies encompass odd-parity order that breaks the inversion and rotational C4 symmetries in iridates as well as in the pseudogap state of high-Tc copper oxides superconductors, which can be described by a loop current phase originally, proposed for high-Tc cuprates. Recently, SHG measurements reported a new order parameter in Sr2CuO2Cl2 that breaks both magnetic and structural point group symmetries, a potential new ferromagnetic octupolar order parameter. To search for this new phase, we apply for 7 days on Thales equipped with its polarized neutron set-up.

Experimental Report

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Data Citation

The recommended format for citing this dataset in a research publication is in the following format:

BOUNOUA Dalila; ANDERSON Zachary; BOEHM Martin; Bourges; GREVEN Martin; SIDIS Yvan; SPIEKER RICHARD; STEFFENS Paul and VERSEILS Marine. (2021). Possible octupolar phase in oxychlorine copper oxide. Institut Laue-Langevin (ILL) doi:10.5291/ILL-DATA.5-53-291

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Metadata

Experiment Parameters

  • Environment temperature

    Stable
  • Experiment energy

    2.57 A-1

Sample Parameters

  • Formula

    • Sr2CuO2Cl2