Spontaneous Hall effect enhanced by local Ir moments in epitaxial Pr2Ir2O7 thin films

Guo, Lu; Campbell, Neil; Choi, Yongseong; Kim, Jong-Woo; Ryan, Philip J.; Huyan, Huaixun; Li, Linze; Nan, Tianxiang; Kang, Jong-Hong; Sundahl, Chris; Pan, Xiaoqing; Rzchowski, M. S.; Eom, Chang-Beom

doi:10.1103/PhysRevB.101.104405

Title: Spontaneous Hall effect enhanced by local Ir moments in epitaxial Pr₂Ir₂O₇ thin films

Abstract

Rare-earth pyrochlore iridates (RE₂Ir₂O₇) consist of two interpenetrating cation sublattices, the RE with highly frustrated magnetic moments, and the iridium with extended conduction orbitals significantly mixed by spin-orbit interactions. The coexistence and coupling of these two sublattices create a landscape for discovery and manipulation of quantum phenomena such as the topological Hall effect, massless conduction bands, and quantum criticality. Thin films allow extended control of the material system via symmetry-lowering effects such as strain. While bulk Pr₂Ir₂O₇ shows a spontaneous hysteretic Hall effect below 1.5 K, we observe the effect at elevated temperatures up to 15 K in epitaxial thin films on (111) yttria-stabilized zirconia (YSZ) substrates synthesized via solid-phase epitaxy. Similar to the bulk, the lack of observable long-range magnetic order in the thin films points to a topological origin. We use synchrotron-based element-specific x-ray diffraction and x-ray magnetic circular dichroism to compare powders and thin films to attribute the spontaneous Hall effect in the films to localization of the Ir moments. Further, we link the thin-film Ir local moments to lattice distortions absent in the bulklike powders. We conclude that the elevated-temperature spontaneous Hall effect is caused by the topological effect originating either from the Ir or Prmore »« less

Authors:

Guo, Lu ^[1]; Campbell, Neil ^[1]; Choi, Yongseong ^[2]; Kim, Jong-Woo ^[2]; Ryan, Philip J. ^[3]; Huyan, Huaixun ^[4]; Li, Linze ^[4]; Nan, Tianxiang ^[1];

^[1]; Sundahl, Chris ^[1];

^[4]; Rzchowski, M. S. ^[1];

^[1]

Univ. of Wisconsin, Madison, WI (United States)
Argonne National Lab. (ANL), Argonne, IL (United States). Advanced Photon Source (APS)
Argonne National Lab. (ANL), Argonne, IL (United States). Advanced Photon Source (APS); Dublin City Univ. (Ireland)
Univ. of California, Irvine, CA (United States)

Publication Date:: Thu Mar 05 00:00:00 EST 2020

Research Org.:: Argonne National Laboratory (ANL), Argonne, IL (United States). Advanced Photon Source (APS)

Sponsoring Org.:: USDOE Office of Science (SC), Basic Energy Sciences (BES); National Science Foundation (NSF)

OSTI Identifier:: 1631592

Alternate Identifier(s):: OSTI ID: 1603733

Grant/Contract Number:: AC02-06CH11357; DMR-1720415; FG02-06ER46327

Resource Type:: Accepted Manuscript

Journal Name:: Physical Review B

Additional Journal Information:: Journal Volume: 101; Journal Issue: 10; 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; 36 MATERIALS SCIENCE

Citation Formats


                    Guo, Lu, Campbell, Neil, Choi, Yongseong, Kim, Jong-Woo, Ryan, Philip J., Huyan, Huaixun, Li, Linze, Nan, Tianxiang, Kang, Jong-Hong, Sundahl, Chris, Pan, Xiaoqing, Rzchowski, M. S., and Eom, Chang-Beom. Spontaneous Hall effect enhanced by local Ir moments in epitaxial Pr2Ir2O7 thin films.  United States: N. p., 2020. 
Web.  doi:10.1103/PhysRevB.101.104405.

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                    Guo, Lu, Campbell, Neil, Choi, Yongseong, Kim, Jong-Woo, Ryan, Philip J., Huyan, Huaixun, Li, Linze, Nan, Tianxiang, Kang, Jong-Hong, Sundahl, Chris, Pan, Xiaoqing, Rzchowski, M. S., & Eom, Chang-Beom. Spontaneous Hall effect enhanced by local Ir moments in epitaxial Pr2Ir2O7 thin films.  United States.  https://doi.org/10.1103/PhysRevB.101.104405

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                    Guo, Lu, Campbell, Neil, Choi, Yongseong, Kim, Jong-Woo, Ryan, Philip J., Huyan, Huaixun, Li, Linze, Nan, Tianxiang, Kang, Jong-Hong, Sundahl, Chris, Pan, Xiaoqing, Rzchowski, M. S., and Eom, Chang-Beom. Thu .  
"Spontaneous Hall effect enhanced by local Ir moments in epitaxial Pr2Ir2O7 thin films".  United States.  https://doi.org/10.1103/PhysRevB.101.104405.  https://www.osti.gov/servlets/purl/1631592.

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@article{osti_1631592,

  title        = {Spontaneous Hall effect enhanced by local Ir moments in epitaxial Pr2Ir2O7 thin films},

  author       = {Guo, Lu and Campbell, Neil and Choi, Yongseong and Kim, Jong-Woo and Ryan, Philip J. and Huyan, Huaixun and Li, Linze and Nan, Tianxiang and Kang, Jong-Hong and Sundahl, Chris and Pan, Xiaoqing and Rzchowski, M. S. and Eom, Chang-Beom},

  abstractNote = {Rare-earth pyrochlore iridates (RE2Ir2O7) consist of two interpenetrating cation sublattices, the RE with highly frustrated magnetic moments, and the iridium with extended conduction orbitals significantly mixed by spin-orbit interactions. The coexistence and coupling of these two sublattices create a landscape for discovery and manipulation of quantum phenomena such as the topological Hall effect, massless conduction bands, and quantum criticality. Thin films allow extended control of the material system via symmetry-lowering effects such as strain. While bulk Pr2Ir2O7 shows a spontaneous hysteretic Hall effect below 1.5 K, we observe the effect at elevated temperatures up to 15 K in epitaxial thin films on (111) yttria-stabilized zirconia (YSZ) substrates synthesized via solid-phase epitaxy. Similar to the bulk, the lack of observable long-range magnetic order in the thin films points to a topological origin. We use synchrotron-based element-specific x-ray diffraction and x-ray magnetic circular dichroism to compare powders and thin films to attribute the spontaneous Hall effect in the films to localization of the Ir moments. Further, we link the thin-film Ir local moments to lattice distortions absent in the bulklike powders. We conclude that the elevated-temperature spontaneous Hall effect is caused by the topological effect originating either from the Ir or Pr sublattice, with interaction strength enhanced by the Ir local moments. This spontaneous Hall effect with weak net moment highlights the effect of vanishingly small lattice distortions as a means to discover topological phenomena in metallic frustrated magnetic materials.},

  doi          = {10.1103/PhysRevB.101.104405},

  journal      = {Physical Review B},

  number       = 10,

  volume       = 101,

  place        = {United States},

  year         = {Thu Mar 05 00:00:00 EST 2020},

  month        = {Thu Mar 05 00:00:00 EST 2020}

}

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Works referenced in this record:

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Tomiyasu, Keisuke; Matsuhira, Kazuyuki; Iwasa, Kazuaki
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Controlling entangled spin-orbit coupling of $5 d$ states with interfacial heterostructure engineering
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Ohtsuki, Takumi; Tian, Zhaoming; Endo, Akira
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Similar Records

Title: Spontaneous Hall effect enhanced by local Ir moments in epitaxial Pr2Ir2O7 thin films

Abstract

Citation Formats

Determination of long-range all-in-all-out ordering of Ir 4 + moments in a pyrochlore iridate Eu 2 Ir 2 O 7 by resonant x-ray diffraction journal, March 2013

Local Probe for Spin-Orbit Interaction journal, May 1988

Large trigonal-field effect on spin-orbit coupled states in a pyrochlore iridate journal, September 2015

All-in–all-Out Magnetic Order and Propagating Spin Waves in Sm 2 Ir 2 O 7 journal, July 2016

Metal–Insulator Transitions in Pyrochlore Oxides Ln 2 Ir 2 O 7 journal, September 2011

Dimensionality Driven Spin-Flop Transition in Layered Iridates journal, July 2012

Quadratic Fermi node in a 3D strongly correlated semimetal journal, December 2015

Emergence of Magnetic Long-range Order in Frustrated Pyrochlore Nd 2 Ir 2 O 7 with Metal–Insulator Transition journal, March 2012

Controlling entangled spin-orbit coupling of 5 d states with interfacial heterostructure engineering journal, March 2018

Topological insulators and metal-insulator transition in the pyrochlore iridates journal, August 2010

Large anomalous Hall effect in a non-collinear antiferromagnet at room temperature journal, October 2015

Strain-induced spontaneous Hall effect in an epitaxial thin film of a Luttinger semimetal journal, April 2019

Odd-parity magnetoresistance in pyrochlore iridate thin films with broken time-reversal symmetry journal, May 2015

Time-reversal symmetry breaking and spontaneous Hall effect without magnetic dipole order journal, December 2009

Metallic Spin-Liquid Behavior of the Geometrically Frustrated Kondo Lattice Pr 2 Ir 2 O 7 journal, March 2006

Pressure Tuning of the Spin-Orbit Coupled Ground State in Sr 2 IrO 4 journal, July 2012

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Dielectric anomalies and interactions in the three-dimensional quadratic band touching Luttinger semimetal Pr2Ir2O7 journal, December 2017

Title: Spontaneous Hall effect enhanced by local Ir moments in epitaxial Pr₂Ir₂O₇ thin films

Determination of long-range all-in-all-out ordering of Ir $^{4 +}$ moments in a pyrochlore iridate Eu $_{2}$ Ir $_{2}$ O $_{7}$ by resonant x-ray diffraction
journal, March 2013

Local Probe for Spin-Orbit Interaction
journal, May 1988

Large trigonal-field effect on spin-orbit coupled states in a pyrochlore iridate
journal, September 2015

All-in–all-Out Magnetic Order and Propagating Spin Waves in ${Sm}_{2} {Ir}_{2} O_{7}$
journal, July 2016

Metal–Insulator Transitions in Pyrochlore Oxides Ln ₂ Ir ₂ O ₇
journal, September 2011

Dimensionality Driven Spin-Flop Transition in Layered Iridates
journal, July 2012

Quadratic Fermi node in a 3D strongly correlated semimetal
journal, December 2015

Emergence of Magnetic Long-range Order in Frustrated Pyrochlore Nd ₂ Ir ₂ O ₇ with Metal–Insulator Transition
journal, March 2012

Controlling entangled spin-orbit coupling of $5 d$ states with interfacial heterostructure engineering
journal, March 2018

Topological insulators and metal-insulator transition in the pyrochlore iridates
journal, August 2010

Large anomalous Hall effect in a non-collinear antiferromagnet at room temperature
journal, October 2015

Strain-induced spontaneous Hall effect in an epitaxial thin film of a Luttinger semimetal
journal, April 2019

Odd-parity magnetoresistance in pyrochlore iridate thin films with broken time-reversal symmetry
journal, May 2015

Time-reversal symmetry breaking and spontaneous Hall effect without magnetic dipole order
journal, December 2009

Metallic Spin-Liquid Behavior of the Geometrically Frustrated Kondo Lattice $\Pr_{2} {Ir}_{2} O_{7}$
journal, March 2006

Pressure Tuning of the Spin-Orbit Coupled Ground State in ${Sr}_{2} {IrO}_{4}$
journal, July 2012

Engineering a Spin-Orbital Magnetic Insulator by Tailoring Superlattices
journal, June 2015

Dielectric anomalies and interactions in the three-dimensional quadratic band touching Luttinger semimetal Pr2Ir2O7
journal, December 2017