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DC Field | Value | Language |
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dc.contributor.author | Singh, Yogesh | - |
dc.date.accessioned | 2020-12-12T09:10:22Z | - |
dc.date.available | 2020-12-12T09:10:22Z | - |
dc.date.issued | 2013 | - |
dc.identifier.citation | Physical Review Letters,109(26). | en_US |
dc.identifier.other | https://doi.org/10.1103/PhysRevLett.109.266406 | - |
dc.identifier.uri | https://journals.aps.org/prl/abstract/10.1103/PhysRevLett.109.266406 | - |
dc.identifier.uri | http://hdl.handle.net/123456789/3073 | - |
dc.description | Only IISERM authors are available in the record. | - |
dc.description.abstract | We study Na 2 IrO 3 by angle-resolved photoemission spectroscopy, optics, and band structure calculations in the local-density approximation (LDA). The weak dispersion of the Ir 5 d - t 2 g manifold highlights the importance of structural distortions and spin-orbit (SO) coupling in driving the system closer to a Mott transition. We detect an insulating gap Δ gap ≃ 340 meV which, at variance with a Slater-type description, is already open at 300 K and does not show significant temperature dependence even across T N ≃ 15 K . An LDA analysis with the inclusion of SO and Coulomb repulsion U reveals that, while the prodromes of an underlying insulating state are already found in LDA + SO , the correct gap magnitude can only be reproduced by LDA + SO + U , with U = 3 eV . This establishes Na 2 IrO 3 as a novel type of Mott-like correlated insulator in which Coulomb and relativistic effects have to be treated on an equal footing. | en_US |
dc.language.iso | en | en_US |
dc.publisher | American Physical Society | en_US |
dc.subject | Spin-orbit | en_US |
dc.subject | LDA | en_US |
dc.subject | Spectroscopy | en_US |
dc.title | Na 2 IrO 3 as a Novel Relativistic Mott Insulator with a 340-meV Gap | en_US |
dc.type | Article | en_US |
Appears in Collections: | Research Articles |
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