Evolution of the remnant Fermi-surface state in the lightly doped correlated spin-orbit insulator Sr2-xLaxIrO4

Kensei Terashima, M. Sunagawa, H. Fujiwara, T. Fukura, M. Fujii, K. Okada, Kazumasa Horigane, Kaya Kobayashi, Rie Horie, Jun Akimitsu, E. Golias, D. Marchenko, A. Varykhalov, N. L. Saini, Takanori Wakita, Yuji Muraoka, Takayoshi Yokoya

Research output: Contribution to journalArticle

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Abstract

The electronic structure of the lightly electron-doped correlated spin-orbit insulator Sr2IrO4 has been studied by angle-resolved photoelectron spectroscopy. We have observed the coexistence of a lower Hubbard band and an in-gap band; the momentum dependence of the latter traces that of the band calculations without on-site Coulomb repulsion. The in-gap state remained anisotropically gapped in all observed momentum areas, forming a remnant Fermi-surface state, evolving towards the Fermi energy by carrier doping. These experimental results show a striking similarity with those observed in deeply underdoped cuprates, suggesting the common nature of the nodal liquid states observed in both compounds.

Original languageEnglish
Article number041106
JournalPhysical Review B
Volume96
Issue number4
DOIs
Publication statusPublished - Jul 7 2017

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Fermi surface
Surface states
Fermi surfaces
Momentum
Orbits
insulators
orbits
Photoelectron spectroscopy
Fermi level
Electronic structure
momentum
Energy gap
Doping (additives)
cuprates
Electrons
Liquids
photoelectron spectroscopy
electronic structure
liquids
electrons

ASJC Scopus subject areas

  • Condensed Matter Physics

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Evolution of the remnant Fermi-surface state in the lightly doped correlated spin-orbit insulator Sr2-xLaxIrO4. / Terashima, Kensei; Sunagawa, M.; Fujiwara, H.; Fukura, T.; Fujii, M.; Okada, K.; Horigane, Kazumasa; Kobayashi, Kaya; Horie, Rie; Akimitsu, Jun; Golias, E.; Marchenko, D.; Varykhalov, A.; Saini, N. L.; Wakita, Takanori; Muraoka, Yuji; Yokoya, Takayoshi.

In: Physical Review B, Vol. 96, No. 4, 041106, 07.07.2017.

Research output: Contribution to journalArticle

Terashima, Kensei ; Sunagawa, M. ; Fujiwara, H. ; Fukura, T. ; Fujii, M. ; Okada, K. ; Horigane, Kazumasa ; Kobayashi, Kaya ; Horie, Rie ; Akimitsu, Jun ; Golias, E. ; Marchenko, D. ; Varykhalov, A. ; Saini, N. L. ; Wakita, Takanori ; Muraoka, Yuji ; Yokoya, Takayoshi. / Evolution of the remnant Fermi-surface state in the lightly doped correlated spin-orbit insulator Sr2-xLaxIrO4. In: Physical Review B. 2017 ; Vol. 96, No. 4.
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abstract = "The electronic structure of the lightly electron-doped correlated spin-orbit insulator Sr2IrO4 has been studied by angle-resolved photoelectron spectroscopy. We have observed the coexistence of a lower Hubbard band and an in-gap band; the momentum dependence of the latter traces that of the band calculations without on-site Coulomb repulsion. The in-gap state remained anisotropically gapped in all observed momentum areas, forming a remnant Fermi-surface state, evolving towards the Fermi energy by carrier doping. These experimental results show a striking similarity with those observed in deeply underdoped cuprates, suggesting the common nature of the nodal liquid states observed in both compounds.",
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AU - Terashima, Kensei

AU - Sunagawa, M.

AU - Fujiwara, H.

AU - Fukura, T.

AU - Fujii, M.

AU - Okada, K.

AU - Horigane, Kazumasa

AU - Kobayashi, Kaya

AU - Horie, Rie

AU - Akimitsu, Jun

AU - Golias, E.

AU - Marchenko, D.

AU - Varykhalov, A.

AU - Saini, N. L.

AU - Wakita, Takanori

AU - Muraoka, Yuji

AU - Yokoya, Takayoshi

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AB - The electronic structure of the lightly electron-doped correlated spin-orbit insulator Sr2IrO4 has been studied by angle-resolved photoelectron spectroscopy. We have observed the coexistence of a lower Hubbard band and an in-gap band; the momentum dependence of the latter traces that of the band calculations without on-site Coulomb repulsion. The in-gap state remained anisotropically gapped in all observed momentum areas, forming a remnant Fermi-surface state, evolving towards the Fermi energy by carrier doping. These experimental results show a striking similarity with those observed in deeply underdoped cuprates, suggesting the common nature of the nodal liquid states observed in both compounds.

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