Search for bi-axial magnetism in single-layer Hg1201
The understanding of the pseudo-gap (PG) phase of the superconducting cuprates is a major scientific challenge. Various symmetry breakings in the PG state have been discovered, including q=0 magnetism that preserves the lattice translational (LT) symmetry and incipient charge-density-wave order that breaks the LT symmetry. However, none of these states can (alone) account for the PG, i.e., the partial gapping of the Fermi surface. Recently, we reported a hidden LT-breaking magnetism. Our polarized neutron diffraction measurements revealed magnetic correlations in underdoped bi-layer YBa2Cu3O6.6 single crystals that emerge below the PG onset temperature with (i) a planar propagation wave vector (¿, 0) ¿ (0, ¿) yielding a doubling or quadrupling of the magnetic unit cell and (ii) magnetic moments mainly pointing perpendicular to the CuO2 layers. The purpose of the experiment is to test the universality of the observation of a bi-axial magnetic response by studying the structurally simpler single-layer cuprate HgBa2CuO4+¿.
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The recommended format for citing this dataset in a research publication is in the following format:
SIDIS Yvan; Samuel Bayliff; BOUNOUA Dalila; Bourges; GREVEN Martin; William Liège and RAYMOND Stephane. (2023). Search for bi-axial magnetism in single-layer Hg1201. Institut Laue-Langevin (ILL) doi:10.5291/ILL-DATA.4-02-624
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