Spectroscopic indications of polaronic behavior of the strong spin-orbit insulator Sr3Ir2O7

Phil King; T. Takayama; Anna Tamai; Emil Jerzy Rozbicki; Siobhan Ellen McKeown Walker; M. Shi; L. Patthey; R.G. Moore; D. Lu; K. M. Shen; H. Takagi; Felix Baumberger

doi:10.1103/PhysRevB.87.241106

Spectroscopic indications of polaronic behavior of the strong spin-orbit insulator Sr₃Ir₂O₇

Phil King, T. Takayama, Anna Tamai, Emil Jerzy Rozbicki, Siobhan Ellen McKeown Walker, M. Shi, L. Patthey, R.G. Moore, D. Lu, K. M. Shen, H. Takagi, Felix Baumberger

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Abstract

We investigate the bilayer Ruddlesden-Popper iridate Sr₃Ir₂O₇ by temperature-dependent angle-resolved photoemission. At low temperatures, we find a fully gapped correlated insulator, characterized by a small charge gap and narrow bandwidths. The low-energy spectral features show a pronounced temperature-dependent broadening and non-quasiparticle-like Gaussian line shapes. Together, these spectral features provide experimental evidence for a polaronic ground state. We observe similar behavior for the single-layer cousin Sr₂IrO₄, indicating that strong electron-boson coupling dominates the low-energy excitations of this exotic family of 5d compounds.

Original language	English
Article number	241106
Number of pages	6
Journal	Physical Review. B, Condensed matter and materials physics
Volume	87
Issue number	24
DOIs	https://doi.org/10.1103/PhysRevB.87.241106
Publication status	Published - 24 Jun 2013

Keywords

SR2IRO4
Oxide

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10.1103/PhysRevB.87.241106

king2013physrevv241106
©2013 American Physical Society.
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King, P., Takayama, T., Tamai, A., Rozbicki, E. J., McKeown Walker, S. E., Shi, M., Patthey, L., Moore, R. G., Lu, D., Shen, K. M., Takagi, H., & Baumberger, F. (2013). Spectroscopic indications of polaronic behavior of the strong spin-orbit insulator Sr₃Ir₂O₇. Physical Review. B, Condensed matter and materials physics, 87(24), Article 241106. https://doi.org/10.1103/PhysRevB.87.241106

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title = "Spectroscopic indications of polaronic behavior of the strong spin-orbit insulator Sr3Ir2O7",

abstract = "We investigate the bilayer Ruddlesden-Popper iridate Sr3Ir2O7 by temperature-dependent angle-resolved photoemission. At low temperatures, we find a fully gapped correlated insulator, characterized by a small charge gap and narrow bandwidths. The low-energy spectral features show a pronounced temperature-dependent broadening and non-quasiparticle-like Gaussian line shapes. Together, these spectral features provide experimental evidence for a polaronic ground state. We observe similar behavior for the single-layer cousin Sr2IrO4, indicating that strong electron-boson coupling dominates the low-energy excitations of this exotic family of 5d compounds.",

keywords = "SR2IRO4, Oxide",

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T1 - Spectroscopic indications of polaronic behavior of the strong spin-orbit insulator Sr3Ir2O7

AU - King, Phil

AU - Takayama, T.

AU - Tamai, Anna

AU - Rozbicki, Emil Jerzy

AU - McKeown Walker, Siobhan Ellen

AU - Shi, M.

AU - Patthey, L.

AU - Moore, R.G.

AU - Lu, D.

AU - Shen, K. M.

AU - Takagi, H.

AU - Baumberger, Felix

PY - 2013/6/24

Y1 - 2013/6/24

N2 - We investigate the bilayer Ruddlesden-Popper iridate Sr3Ir2O7 by temperature-dependent angle-resolved photoemission. At low temperatures, we find a fully gapped correlated insulator, characterized by a small charge gap and narrow bandwidths. The low-energy spectral features show a pronounced temperature-dependent broadening and non-quasiparticle-like Gaussian line shapes. Together, these spectral features provide experimental evidence for a polaronic ground state. We observe similar behavior for the single-layer cousin Sr2IrO4, indicating that strong electron-boson coupling dominates the low-energy excitations of this exotic family of 5d compounds.

AB - We investigate the bilayer Ruddlesden-Popper iridate Sr3Ir2O7 by temperature-dependent angle-resolved photoemission. At low temperatures, we find a fully gapped correlated insulator, characterized by a small charge gap and narrow bandwidths. The low-energy spectral features show a pronounced temperature-dependent broadening and non-quasiparticle-like Gaussian line shapes. Together, these spectral features provide experimental evidence for a polaronic ground state. We observe similar behavior for the single-layer cousin Sr2IrO4, indicating that strong electron-boson coupling dominates the low-energy excitations of this exotic family of 5d compounds.

KW - SR2IRO4

KW - Oxide

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DO - 10.1103/PhysRevB.87.241106

M3 - Article

SN - 1098-0121

VL - 87

JO - Physical Review. B, Condensed matter and materials physics

JF - Physical Review. B, Condensed matter and materials physics

IS - 24

M1 - 241106

ER -

Spectroscopic indications of polaronic behavior of the strong spin-orbit insulator Sr₃Ir₂O₇

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Topological Protection and NonEquilibriu: Topological Protection and NonEquilibrium States in Strongly Correlated Electron Systems

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Spectroscopic indications of polaronic behavior of the strong spin-orbit insulator Sr3Ir2O7

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Topological Protection and NonEquilibriu: Topological Protection and NonEquilibrium States in Strongly Correlated Electron Systems

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Spectroscopic indications of polaronic behavior of the strong spin-orbit insulator Sr₃Ir₂O₇