Antiferromagnetic response of the extremely underdoped model cuprate HgBa2CuO4+d
The undoped cuprates are antiferromagnetic (AF) Mott insulators which produce a range of complex electronic and magnetic phenomena when doped with holes, including high-temperature superconductivity, T-linear resistivity in the normal state, charge density wave order, and the opening of a pseudogap at the Fermi level. Much of the physics of the normal state and the pairing mechanism that results in superconductivity upon cooling remains contested, though several theoretical descriptions indicate that AF correlations play a central role. In many cuprates, notably La2-xSrxCuO4 and YBa2Cu3O6+d, these correlations consist of magnetic excitations with an X-shaped dispersion centered on the AF wave vector. These materials are complicated by low structural symmetry or and/or disorder which mask the underlying physics of the CuO2 planes. In previous measurements of moderately underdoped HgBa2CuO4+d (Hg1201) - a simple-tetragonal compound - we found a Y-shaped AF dispersion indicating the response of pristine CuO2 planes. We propose to continue these measurements with a new extremely-underdoped sample, near the edge of the superconducting dome, and with an AF gap of only a few meV.
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The recommended format for citing this dataset in a research publication is in the following format:
ANDERSON Zachary; Samuel Bayliff; BOUNOUA Dalila; Bourges; IVANOV Alexandre; William Liège; PIOVANO Andrea and SIDIS Yvan. (2023). Antiferromagnetic response of the extremely underdoped model cuprate HgBa2CuO4+d. Institut Laue-Langevin (ILL) doi:10.5291/ILL-DATA.4-02-620
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This data is not yet public
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