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Title: Nematicity in stripe ordered cuprates probed via resonant x-ray scattering

We found that in underdoped cuprate superconductors, a rich competition occurs between superconductivity and charge density wave (CDW) order. Whether rotational symmetry-breaking (nematicity) occurs intrinsically and generically or as a consequence of other orders is under debate. Here, we employ resonant x-ray scattering in stripe-ordered superconductors (La,M)2CuO4 to probe the relationship between electronic nematicity of the Cu 3d orbitals, structure of the (La,M)2O2 layers, and CDW order. We find distinct temperature dependences for the structure of the (La,M)2O2 layers and the electronic nematicity of the CuO2 planes, with only the latter being enhanced by the onset of CDW order. Our results identify electronic nematicity as an order parameter that is distinct from a purely structural order parameter in underdoped striped cuprates.
Authors:
 [1] ;  [2] ;  [1] ;  [3] ;  [3] ;  [1] ;  [1] ;  [4] ;  [5] ;  [5] ;  [6] ;  [7] ;  [7] ;  [8] ;
  1. Univ. of Waterloo, ON (Canada)
  2. Leibniz Inst. for Solid State and Materials Research (IFW), Dresden (Germany)
  3. Canadian Light Sources, Inc., Saskatoon, SK (Canada)
  4. Univ. of Waterloo, ON (Canada); Canadian Inst. for Advanced Research, Toronto, ON (Canada); Perimeter Inst. for Theoretical Physics, Waterloo, ON (Canada)
  5. Brookhaven National Lab. (BNL), Upton, NY (United States)
  6. Univ. Paris-Sud, Orsay (France)
  7. Univ. of Toronto, ON (Canada)
  8. Leibniz Inst. for Solid State and Materials Research (IFW), Dresden (Germany); Paris Lodron Univ., Salzburg (Austria)
Publication Date:
OSTI Identifier:
1240593
Report Number(s):
BNL--111782-2016-JA
Journal ID: ISSN 0036-8075; R&D Project: PO010; KC0201060
Grant/Contract Number:
SC00112704
Type:
Accepted Manuscript
Journal Name:
Science
Additional Journal Information:
Journal Volume: 351; Journal Issue: 6273; Journal ID: ISSN 0036-8075
Publisher:
AAAS
Research Org:
Brookhaven National Laboratory (BNL), Upton, NY (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