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.
Final published version, 1.74 MB

Topological Protection and NonEquilibriu: Topological Protection and NonEquilibrium States in Strongly Correlated Electron Systems
Wahl, P. (PI), Baumberger, F. (CoI), Davis, J. C. (CoI), Green, A. (CoI), Hooley, C. (CoI), Keeling, J. M. J. (CoI) & Mackenzie, A. (CoI)
EPSRC
1/09/11 → 31/08/17
Project: Standard

Cite this

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.",

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

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doi = "10.1103/PhysRevB.87.241106",

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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

U2 - 10.1103/PhysRevB.87.241106

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

Abstract

Keywords

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

Cite this

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