Influence of electron doping on the ground state of (Sr1-xLax)2IrO4

Chen, Xiang; Hogan, Tom; Walkup, D.; Zhou, Wenwen; Pokharel, M.; Yao, Mengliang; Tian, Wei; Ward, Thomas Zac; Zhao, Y.; Parshall, Dr. D.; Opeil, C.; Lynn, J. W.; Madhavan, Vidya; Wilson, Stephen

doi:10.1103/PhysRevB.92.075125

Title: Influence of electron doping on the ground state of (Sr_1-xLa_x)₂IrO₄

Journal Article · Mon Aug 17 00:00:00 EDT 2015 · Physical Review. B, Condensed Matter and Materials Physics

DOI:https://doi.org/10.1103/PhysRevB.92.075125· OSTI ID:1286907

Chen, Xiang ^[1]; Hogan, Tom ^[1]; Walkup, D. ^[2]; Zhou, Wenwen ^[2]; Pokharel, M. ^[2]; Yao, Mengliang ^[2]; Tian, Wei ^[3]; Ward, Thomas Zac ^[3]; Zhao, Y. ^[4]; Parshall, Dr. D. ^[5]; Opeil, C. ^[2]; Lynn, J. W. ^[6]; Madhavan, Vidya ^[7]; Wilson, Stephen ^[1]

Univ. of California, Santa Barbara, CA (United States)
Boston College, Chestnut Hill, MA (United States)
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
National Inst. of Standards and Technology (NIST), Gaithersburg, MD (United States); Univ. of Maryland, College Park, MD (United States)
National Inst. of Standards and Technology (NIST), Gaithersburg, MD (United States). Center for Neutron Research
National Inst. of Standards and Technology (NIST), Gaithersburg, MD (United States)
Univ. of Illinois, Urbana-Champaign, IL (United States)

The evolution of the electronic properties of electron-doped (Sr_1-xLa_x)₂IrO₄ is experimentally explored as the doping limit of La is approached. As electrons are introduced, the electronic ground state transitions from a spin-orbit Mott phase into an electronically phase separated state, where long-range magnetic order vanishes beyond x = 0:02 and charge transport remains percolative up to the limit of La substitution (x =0:06). In particular, the electronic ground state remains inhomogeneous even beyond the collapse of the parent state's long-range antiferromagnetic order, while persistent short-range magnetism survives up to the highest La-substitution levels. Furthermore, as electrons are doped into Sr₂IrO₄, we observe the appearance of a low temperature magnetic glass-like state intermediate to the complete suppression of antiferromagnetic order. Universalities and di erences in the electron-doped phase diagrams of single layer and bilayer Ruddlesden-Popper strontium iridates are discussed.

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Research Organization:: Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States). Spallation Neutron Source (SNS)

Sponsoring Organization:: USDOE

Grant/Contract Number:: AC05-00OR22725; AC02-06CH11357

OSTI ID:: 1286907

Alternate ID(s):: OSTI ID: 1211566

Journal Information:: Physical Review. B, Condensed Matter and Materials Physics, Vol. 92, Issue 7; ISSN 1098-0121

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 86 works

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