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Title: Unidirectional spin density wave state in metallic (Sr 1-xLax) 2IrO 4

Materials that exhibit both strong spin–orbit coupling and electron correlation effects are predicted to host numerous new electronic states. One prominent example is the J eff = 1/2 Mott state in Sr 2IrO 4, where introducing carriers is predicted to manifest high temperature superconductivity analogous to the S=1/2 Mott state of La 2CuO 4. While bulk super- conductivity currently remains elusive, anomalous quasiparticle behaviors paralleling those in the cuprates such as pseudogap formation and the formation of a d-wave gap are observed upon electron-doping Sr 2IrO 4. Here we establish a magnetic parallel between electron-doped Sr 2IrO 4 and hole-doped La 2CuO 4 by unveiling a spin density wave state in electron-doped Sr 2IrO 4. Our magnetic resonant X-ray scattering data reveal the presence of an incom- mensurate magnetic state reminiscent of the diagonal spin density wave state observed in the monolayer cuprate (La 1-xSr x) 2CuO 4. Furthermore, this link supports the conjecture that the quenched Mott phases in electron-doped Sr 2IrO 4 and hole-doped La 2CuO 4 support common competing electronic phases.
Authors:
ORCiD logo [1] ;  [2] ;  [3] ;  [2] ;  [2] ;  [4] ;  [4] ;  [2]
  1. Boston College, Chestnut Hill, MA (United States); Univ. of California, Santa Barbara, CA (United States)
  2. Univ. of California, Santa Barbara, CA (United States)
  3. Argonne National Lab. (ANL), Argonne, IL (United States)
  4. Cornell Univ., Ithaca, NY (United States)
Publication Date:
Grant/Contract Number:
AC02-06CH11357
Type:
Accepted Manuscript
Journal Name:
Nature Communications
Additional Journal Information:
Journal Volume: 9; Journal Issue: 1; Journal ID: ISSN 2041-1723
Publisher:
Nature Publishing Group
Research Org:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org:
National Science Foundation (NSF); USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
Country of Publication:
United States
Language:
English
Subject:
74 ATOMIC AND MOLECULAR PHYSICS
OSTI Identifier:
1425217