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Title: Unidirectional spin density wave state in metallic (Sr1-xLax)2IrO4

Journal Article · · Nature Communications
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)

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 Jeff = 1/2 Mott state in Sr2IrO4, where introducing carriers is predicted to manifest high temperature superconductivity analogous to the S=1/2 Mott state of La2CuO4. 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 Sr2IrO4. Here we establish a magnetic parallel between electron-doped Sr2IrO4 and hole-doped La2CuO4 by unveiling a spin density wave state in electron-doped Sr2IrO4. 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 (La1-xSrx)2CuO4. Furthermore, this link supports the conjecture that the quenched Mott phases in electron-doped Sr2IrO4 and hole-doped La2CuO4 support common competing electronic phases.

Research Organization:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Organization:
National Science Foundation (NSF); USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
AC02-06CH11357
OSTI ID:
1425217
Journal Information:
Nature Communications, Vol. 9, Issue 1; ISSN 2041-1723
Publisher:
Nature Publishing GroupCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 27 works
Citation information provided by
Web of Science

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Cited By (11)

The J eff = 1/2 Antiferromagnet Sr 2 IrO 4 : A Golden Avenue toward New Physics and Functions journal October 2019
Atomic-scale fragmentation and collapse of antiferromagnetic order in a doped Mott insulator journal October 2019
Determination of the local structure of Sr 2−x M x IrO 4 (M = K, La) as a function of doping and temperature journal January 2018
Interface-engineered hole doping in Sr 2 IrO 4 /LaNiO 3 heterostructure journal October 2019
Mott transition and collective charge pinning in electron doped Sr 2 IrO 4 journal July 2018
Variational cluster approach to thermodynamic properties of interacting fermions at finite temperatures: A case study of the two-dimensional single-band Hubbard model at half filling journal November 2018
Direct Visualization of Spatial Inhomogeneity of Spin Stripes Order in La1.72Sr0.28NiO4 journal August 2019
Direct Visualization of Spatial Inhomogeneity of Spin Stripes Order in $\mathrm{La_{1.72}Sr_{0.28}NiO_{4}}$ text January 2019
Stability of the Antiferromagnetic State in the Electron Doped Iridates text January 2018
Atomic-scale fragmentation and collapse of antiferromagnetic order in a doped Mott insulator text January 2019
The Jeff=1/2 antiferromagnet Sr2IrO4: A golden avenue toward new physics and functions text January 2021

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