Epitaxially stabilized iridium spinel oxide without cations in the tetrahedral site

Hiromichi Kuriyama; Jobu Matsuno; Seiji Niitaka; Masaya Uchida; Daisuke Hashizume; Aiko Nakao; Kunihisa Sugimoto; Hiroyuki Ohsumi; Masaki Takata; Hidenori Takagi

doi:10.1063/1.3374449

Epitaxially stabilized iridium spinel oxide without cations in the tetrahedral site

Hiromichi Kuriyama, Jobu Matsuno, Seiji Niitaka, Masaya Uchida, Daisuke Hashizume, Aiko Nakao, Kunihisa Sugimoto, Hiroyuki Ohsumi, Masaki Takata, Hidenori Takagi

研究成果: Article › 査読

25 被引用数 (Scopus)

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Single-crystalline thin film of an iridium dioxide polymorph Ir₂ O₄ has been fabricated by the pulsed laser deposition of Li _x Ir₂ O₄ precursor and the subsequent Li-deintercalation using soft chemistry. Ir2 O₄ crystallizes in a spinel (A B₂ O₄) without A cations in the tetrahedral site, which is isostructural to λ -MnO₂. Ir ions form a pyrochlore sublattice, which is known to give rise to a strong geometrical frustration. This Ir spinel was found to be a narrow gap insulator, in remarkable contrast to the metallic ground state of rutile-type IrO₂. We argue that an interplay of a strong spin-orbit coupling and a Coulomb repulsion gives rise to an insulating ground state as in a layered perovskite Sr₂ IrO₄.

本文言語	English
論文番号	182103
ジャーナル	Applied Physics Letters
巻	96
号	18
DOI	https://doi.org/10.1063/1.3374449
出版ステータス	Published - 2010
外部発表	はい

ASJC Scopus subject areas

物理学および天文学（その他）

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title = "Epitaxially stabilized iridium spinel oxide without cations in the tetrahedral site",

abstract = "Single-crystalline thin film of an iridium dioxide polymorph Ir2 O4 has been fabricated by the pulsed laser deposition of Li x Ir2 O4 precursor and the subsequent Li-deintercalation using soft chemistry. Ir2 O4 crystallizes in a spinel (A B2 O4) without A cations in the tetrahedral site, which is isostructural to λ -MnO2. Ir ions form a pyrochlore sublattice, which is known to give rise to a strong geometrical frustration. This Ir spinel was found to be a narrow gap insulator, in remarkable contrast to the metallic ground state of rutile-type IrO2. We argue that an interplay of a strong spin-orbit coupling and a Coulomb repulsion gives rise to an insulating ground state as in a layered perovskite Sr2 IrO4.",

author = "Hiromichi Kuriyama and Jobu Matsuno and Seiji Niitaka and Masaya Uchida and Daisuke Hashizume and Aiko Nakao and Kunihisa Sugimoto and Hiroyuki Ohsumi and Masaki Takata and Hidenori Takagi",

note = "Funding Information: This work was financially supported by Grant-in-Aid for Scientific Research (S) (Grant No. 19104008), Grant-in-Aid for Scientific Research on Priority Areas (Grant No. 19052008), and Grant-in Aid for JSPS Fellows.",

year = "2010",

doi = "10.1063/1.3374449",

language = "English",

volume = "96",

journal = "Applied Physics Letters",

issn = "0003-6951",

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T1 - Epitaxially stabilized iridium spinel oxide without cations in the tetrahedral site

AU - Kuriyama, Hiromichi

AU - Matsuno, Jobu

AU - Niitaka, Seiji

AU - Uchida, Masaya

AU - Hashizume, Daisuke

AU - Nakao, Aiko

AU - Sugimoto, Kunihisa

AU - Ohsumi, Hiroyuki

AU - Takata, Masaki

AU - Takagi, Hidenori

N1 - Funding Information: This work was financially supported by Grant-in-Aid for Scientific Research (S) (Grant No. 19104008), Grant-in-Aid for Scientific Research on Priority Areas (Grant No. 19052008), and Grant-in Aid for JSPS Fellows.

PY - 2010

Y1 - 2010

N2 - Single-crystalline thin film of an iridium dioxide polymorph Ir2 O4 has been fabricated by the pulsed laser deposition of Li x Ir2 O4 precursor and the subsequent Li-deintercalation using soft chemistry. Ir2 O4 crystallizes in a spinel (A B2 O4) without A cations in the tetrahedral site, which is isostructural to λ -MnO2. Ir ions form a pyrochlore sublattice, which is known to give rise to a strong geometrical frustration. This Ir spinel was found to be a narrow gap insulator, in remarkable contrast to the metallic ground state of rutile-type IrO2. We argue that an interplay of a strong spin-orbit coupling and a Coulomb repulsion gives rise to an insulating ground state as in a layered perovskite Sr2 IrO4.

AB - Single-crystalline thin film of an iridium dioxide polymorph Ir2 O4 has been fabricated by the pulsed laser deposition of Li x Ir2 O4 precursor and the subsequent Li-deintercalation using soft chemistry. Ir2 O4 crystallizes in a spinel (A B2 O4) without A cations in the tetrahedral site, which is isostructural to λ -MnO2. Ir ions form a pyrochlore sublattice, which is known to give rise to a strong geometrical frustration. This Ir spinel was found to be a narrow gap insulator, in remarkable contrast to the metallic ground state of rutile-type IrO2. We argue that an interplay of a strong spin-orbit coupling and a Coulomb repulsion gives rise to an insulating ground state as in a layered perovskite Sr2 IrO4.

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DO - 10.1063/1.3374449

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JO - Applied Physics Letters

JF - Applied Physics Letters

SN - 0003-6951

IS - 18

M1 - 182103

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Epitaxially stabilized iridium spinel oxide without cations in the tetrahedral site

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