Antiferromagnetic excitations in the very underdoped model cuprate HgBa2CuO4+x
The cuprates exhibit strong antiferromagnetic (AF) fluctuations even in the superconducting doping range. The prominence of these fluctuations has led to suggestions that they may be involved in the pairing necessary for high-temperature superconductivity. Hence extensive studies have been carried out in La2-xSrxCuO4 (LSCO) and YBa2Cu3O6+x (YBCO), which revealed an hourglass dispersion and related resonance characteristics. In our recent study of the structurally simple model cuprate HgBa2CuO4+x (Hg1201), we observed distinct new features, along with a strong doping dependence of these features. In order to better understand the role that AF fluctuations play in the cuprates, we propose to extend our study to a very underdoped sample with Tc less than 40K.
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TANG Yang; ANDERSON Zachary; BOUNOUA Dalila; Bourges; MANGIN-THRO Lucile; PIOVANO Andrea; SIDIS Yvan and STEFFENS Paul. (2018). Antiferromagnetic excitations in the very underdoped model cuprate HgBa2CuO4+x. Institut Laue-Langevin (ILL) doi:10.5291/ILL-DATA.4-02-486
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