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Title: Commensurate antiferromagnetic excitations as a signature of the pseudogap in the tetragonal high-Tc cuprate HgBa2CuO4+δ

We report that antiferromagnetic correlations have been argued to be the cause of the d-wave superconductivity and the pseudogap phenomena exhibited by the cuprates. Although the antiferromagnetic response in the pseudogap state has been reported for a number of compounds, there exists no information for structurally simple HgBa2CuO4+δ. We report neutron-scattering results for HgBa2CuO4+δ (superconducting transition temperature Tc≈71 K, pseudogap temperature T*≈305 K) that demonstrate the absence of the two most prominent features of the magnetic excitation spectrum of the cuprates: the X-shaped ‘hourglass’ response and the resonance mode in the superconducting state. Instead, the response is Y-shaped, gapped and significantly enhanced below T*, and hence a prominent signature of the pseudogap state.
Authors:
 [1] ;  [2] ;  [3] ;  [2] ;  [2] ;  [2] ;  [2] ;  [4] ;  [5] ;  [6] ;  [3] ;  [7] ;  [5] ;  [3] ;  [2]
  1. Univ. of Minnesota, Minneapolis, MN (United States); Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
  2. Univ. of Minnesota, Minneapolis, MN (United States)
  3. CEA-CNRS, Gif sur Yvette (France)
  4. Univ. of Minnesota, Minneapolis, MN (United States); Jilin Univ., Changchun (China)
  5. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
  6. Neutron source Heinz Maier-Leibnitz (FRM II), Garching (Germany)
  7. Inst. Laue-Langevin (ILL), Grenoble (France)
Publication Date:
OSTI Identifier:
1259490
Grant/Contract Number:
SC0006858; LANLF100; FG02-08ER46544; ANR-14-CE05-0007; ANR-14-OHRI-0010
Type:
Accepted Manuscript
Journal Name:
Nature Communications
Additional Journal Information:
Journal Volume: 7; Journal ID: ISSN 2041-1723
Publisher:
Nature Publishing Group
Research Org:
Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
Sponsoring Org:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY