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Title: Anisotropic softening of magnetic excitations in lightly electron-doped Sr2IrO4

Abstract

The magnetic excitations in electron-doped (Sr1-xLax)2IrO4 with x=0.03 were measured using resonant inelastic x-ray scattering at the Ir L3 edge. Although much broadened, well defined dispersive magnetic excitations were observed. Comparing with the magnetic dispersion from the undoped compound, the evolution of the magnetic excitations upon doping is highly anisotropic. Along the antinodal direction, the dispersion is almost intact. On the other hand, the magnetic excitations along the nodal direction show significant softening. These results establish the presence of strong magnetic correlations in electron-doped (Sr1-xLax)2IrO4 with close analogies to the hole-doped cuprates, further motivating the search for high temperature superconductivity in this system.

Authors:
 [1];  [2];  [3];  [4];  [5];  [4];  [2];  [3];  [2];  [6];  [4];  [2]
+ Show Author Affiliations
  1. Chinese Academy of Sciences (CAS), Beijing (China); Collaborative Innovation Center of Quantum Matter, Beijing (China); Brookhaven National Lab. (BNL), Upton, NY (United States)
  2. Brookhaven National Lab. (BNL), Upton, NY (United States)
  3. Chinese Academy of Sciences (CAS), Beijing (China)
  4. Argonne National Lab. (ANL), Argonne, IL (United States). Advanced Photon Source (APS)
  5. Univ. of Kentucky, Lexington, KY (United States)
  6. Chinese Academy of Sciences (CAS), Beijing (China); Collaborative Innovation Center of Quantum Matter, Beijing (China)
Publication Date:
Research Org.:
Brookhaven National Lab. (BNL), Upton, NY (United States); Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES); National Natural Science Foundation of China (NSFC); National Science Foundation (NSF)
OSTI Identifier:
1303017
Alternate Identifier(s):
OSTI ID: 1256763; OSTI ID: 1390905
Report Number(s):
BNL-112501-2016-JA
Journal ID: ISSN 2469-9950; R&D Project: PO011; KC0201060
Grant/Contract Number:  
SC00112704; AC02-98CH10886; AC02-06CH11357
Resource Type:
Accepted Manuscript
Journal Name:
Physical Review B
Additional Journal Information:
Journal Volume: 93; Journal Issue: 24; Journal ID: ISSN 2469-9950
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY

Citation Formats

Liu, X., Dean, M. P. M., Meng, Z. Y., Upton, M. H., Qi, T., Gog, T., Cao, Y., Lin, J. Q., Meyers, D., Ding, H., Cao, G., and Hill, J. P. Anisotropic softening of magnetic excitations in lightly electron-doped Sr2IrO4. United States: N. p., 2016. Web. doi:10.1103/PhysRevB.93.241102.
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Liu, X., Dean, M. P. M., Meng, Z. Y., Upton, M. H., Qi, T., Gog, T., Cao, Y., Lin, J. Q., Meyers, D., Ding, H., Cao, G., & Hill, J. P. Anisotropic softening of magnetic excitations in lightly electron-doped Sr2IrO4. United States. https://doi.org/10.1103/PhysRevB.93.241102
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Liu, X., Dean, M. P. M., Meng, Z. Y., Upton, M. H., Qi, T., Gog, T., Cao, Y., Lin, J. Q., Meyers, D., Ding, H., Cao, G., and Hill, J. P. Fri . "Anisotropic softening of magnetic excitations in lightly electron-doped Sr2IrO4". United States. https://doi.org/10.1103/PhysRevB.93.241102. https://www.osti.gov/servlets/purl/1303017.
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@article{osti_1303017,
title = {Anisotropic softening of magnetic excitations in lightly electron-doped Sr2IrO4},
author = {Liu, X. and Dean, M. P. M. and Meng, Z. Y. and Upton, M. H. and Qi, T. and Gog, T. and Cao, Y. and Lin, J. Q. and Meyers, D. and Ding, H. and Cao, G. and Hill, J. P.},
abstractNote = {The magnetic excitations in electron-doped (Sr1-xLax)2IrO4 with x=0.03 were measured using resonant inelastic x-ray scattering at the Ir L3 edge. Although much broadened, well defined dispersive magnetic excitations were observed. Comparing with the magnetic dispersion from the undoped compound, the evolution of the magnetic excitations upon doping is highly anisotropic. Along the antinodal direction, the dispersion is almost intact. On the other hand, the magnetic excitations along the nodal direction show significant softening. These results establish the presence of strong magnetic correlations in electron-doped (Sr1-xLax)2IrO4 with close analogies to the hole-doped cuprates, further motivating the search for high temperature superconductivity in this system.},
doi = {10.1103/PhysRevB.93.241102},
journal = {Physical Review B},
number = 24,
volume = 93,
place = {United States},
year = {Fri Jun 10 00:00:00 EDT 2016},
month = {Fri Jun 10 00:00:00 EDT 2016}
}
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https://doi.org/10.1103/PhysRevB.93.241102
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    Works referencing / citing this record:

    Magnetism in iridate heterostructures leveraged by structural distortions
    journal, March 2019

    The challenge of spin–orbit-tuned ground states in iridates: a key issues review
    journal, February 2018

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