Overdamped antiferromagnetic strange metal state in Sr3IrRuO7

Schmehr, Julian L.; Mion, Thomas R.; Porter, Zach; Aling, Michael; Cao, Huibo; Upton, Mary H.; Islam, Zahirul; He, Rui-Hua; Sensarma, Rajdeep; Trivedi, Nandini; Wilson, Stephen D.

doi:10.1103/PhysRevLett.122.157201

Title: Overdamped antiferromagnetic strange metal state in Sr3IrRuO7

Abstract

The unconventional electronic ground state of Sr₃IrRuO₇ is explored via resonant x-ray scattering techniques and angle-resolved photoemission measurements. As the Ru content approaches x=0.5 in Sr₃(Ir_1-xRu_x)₂O₇, intermediate to the J_eff=1/2 Mott state in Sr₃Ir₂O₇ and the quantum critical metal in Sr₃Ru₂O₇, a thermodynamically distinct metallic state emerges. The electronic structure of this intermediate phase lacks coherent quasiparticles, and charge transport exhibits a linear temperature dependence over a wide range of temperatures. Spin dynamics associated with the long-range antiferromagnetism of this phase show nearly local, overdamped magnetic excitations and an anomalously large energy scale of 200 meV—an energy far in excess of exchange energies present within either the Sr₃Ir₂O₇ or Sr₃Ru₂O₇ solid-solution end points. Overdamped quasiparticle dynamics driven by strong spin-charge coupling are proposed to explain the incoherent spectral features of the strange metal state in Sr₃IrRuO₇.

Authors:

Schmehr, Julian L. ^[1]; Mion, Thomas R. ^[2]; Porter, Zach ^[1]; Aling, Michael ^[1]; Cao, Huibo ^[3]; Upton, Mary H. ^[4]; Islam, Zahirul ^[4]; He, Rui-Hua ^[2]; Sensarma, Rajdeep ^[5]; Trivedi, Nandini ^[6]; Wilson, Stephen D. ^[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)
Argonne National Lab. (ANL), Argonne, IL (United States). Advanced Photon Source (APS)
Tata Inst. of Fundamental Research, Mumbai (India)
The Ohio State Univ., Columbus, OH (United States)

Publication Date:: Tue Apr 16 00:00:00 EDT 2019

Research Org.:: Argonne National Lab. (ANL), Argonne, IL (United States); Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)

Sponsoring Org.:: National Science Foundation (NSF); W.M. Keck Foundation; USDOE Office of Science (SC), Basic Energy Sciences (BES). Scientific User Facilities Division

OSTI Identifier:: 1511279

Alternate Identifier(s):: OSTI ID: 1507236; OSTI ID: 1558483

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

Resource Type:: Accepted Manuscript

Journal Name:: Physical Review Letters

Additional Journal Information:: Journal Volume: 122; Journal Issue: 15; Journal ID: ISSN 0031-9007

Publisher:: American Physical Society (APS)

Country of Publication:: United States

Language:: English

Subject:: 36 MATERIALS SCIENCE

Citation Formats


                    Schmehr, Julian L., Mion, Thomas R., Porter, Zach, Aling, Michael, Cao, Huibo, Upton, Mary H., Islam, Zahirul, He, Rui-Hua, Sensarma, Rajdeep, Trivedi, Nandini, and Wilson, Stephen D. Overdamped antiferromagnetic strange metal state in Sr3IrRuO7.  United States: N. p., 2019. 
Web.  doi:10.1103/PhysRevLett.122.157201.

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                    Schmehr, Julian L., Mion, Thomas R., Porter, Zach, Aling, Michael, Cao, Huibo, Upton, Mary H., Islam, Zahirul, He, Rui-Hua, Sensarma, Rajdeep, Trivedi, Nandini, & Wilson, Stephen D. Overdamped antiferromagnetic strange metal state in Sr3IrRuO7.  United States.  https://doi.org/10.1103/PhysRevLett.122.157201

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                    Schmehr, Julian L., Mion, Thomas R., Porter, Zach, Aling, Michael, Cao, Huibo, Upton, Mary H., Islam, Zahirul, He, Rui-Hua, Sensarma, Rajdeep, Trivedi, Nandini, and Wilson, Stephen D. Tue .  
"Overdamped antiferromagnetic strange metal state in Sr3IrRuO7".  United States.  https://doi.org/10.1103/PhysRevLett.122.157201.  https://www.osti.gov/servlets/purl/1511279.

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@article{osti_1511279,

  title        = {Overdamped antiferromagnetic strange metal state in Sr3IrRuO7},

  author       = {Schmehr, Julian L. and Mion, Thomas R. and Porter, Zach and Aling, Michael and Cao, Huibo and Upton, Mary H. and Islam, Zahirul and He, Rui-Hua and Sensarma, Rajdeep and Trivedi, Nandini and Wilson, Stephen D.},

  abstractNote = {The unconventional electronic ground state of Sr3IrRuO7 is explored via resonant x-ray scattering techniques and angle-resolved photoemission measurements. As the Ru content approaches x=0.5 in Sr3(Ir1-xRux)2O7, intermediate to the Jeff=1/2 Mott state in Sr3Ir2O7 and the quantum critical metal in Sr3Ru2O7, a thermodynamically distinct metallic state emerges. The electronic structure of this intermediate phase lacks coherent quasiparticles, and charge transport exhibits a linear temperature dependence over a wide range of temperatures. Spin dynamics associated with the long-range antiferromagnetism of this phase show nearly local, overdamped magnetic excitations and an anomalously large energy scale of 200 meV—an energy far in excess of exchange energies present within either the Sr3Ir2O7 or Sr3Ru2O7 solid-solution end points. Overdamped quasiparticle dynamics driven by strong spin-charge coupling are proposed to explain the incoherent spectral features of the strange metal state in Sr3IrRuO7.},

  doi          = {10.1103/PhysRevLett.122.157201},

  journal      = {Physical Review Letters},

  number       = 15,

  volume       = 122,

  place        = {United States},

  year         = {Tue Apr 16 00:00:00 EDT 2019},

  month        = {Tue Apr 16 00:00:00 EDT 2019}

}

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Title: Overdamped antiferromagnetic strange metal state in Sr3IrRuO7

Abstract

Citation Formats

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Generalized Hund's rule for two-atom systems journal, September 2014

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Resonant inelastic x-ray scattering study of the spin and charge excitations in the overdoped superconductor La 1.77 Sr 0.23 CuO 4 journal, February 2016

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Evidence of quantum dimer excitations in ${Sr}_{3} {Ir}_{2} O_{7}$
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