Bulk- and surface-sensitive high-resolution photoemission study of two mott-hubbard systems: SrVO3 and CaVO3

R. Eguchi; T. Kiss; S. Tsuda; T. Shimojima; T. Mizokami; T. Yokoya; A. Chainani; S. Shin; I. H. Inoue; T. Togashi; S. Watanabe; C. Q. Zhang; C. T. Chen; M. Arita; K. Shimada; H. Namatame; M. Taniguchi

doi:10.1103/PhysRevLett.96.076402

Bulk- and surface-sensitive high-resolution photoemission study of two mott-hubbard systems: SrVO3 and CaVO3

R. Eguchi, T. Kiss, S. Tsuda, T. Shimojima, T. Mizokami, T. Yokoya, A. Chainani, S. Shin, I. H. Inoue, T. Togashi, S. Watanabe, C. Q. Zhang, C. T. Chen, M. Arita, K. Shimada, H. Namatame, M. Taniguchi

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Abstract

We study the electronic structure of Mott-Hubbard systems SrVO3 and CaVO3 with bulk and surface-sensitive high-resolution photoemission spectroscopy, using a vacuum ultraviolet laser, synchrotron radiation, and a discharge lamp (hν=7-21eV). A systematic suppression of the density of states (DOS) within ∼0.2eV of the Fermi level (EF) is found on decreasing photon energy, i.e., on increasing bulk sensitivity. The coherent band in SrVO3 and CaVO3 is shown to consist of surface and bulk-derived features, separated in energy. The stronger distortion on surface of CaVO3 compared to SrVO3 leads to a higher surface metallicity in the coherent DOS at EF, consistent with recent theory.

Original language	English
Article number	076402
Journal	Physical Review Letters
Volume	96
Issue number	7
DOIs	https://doi.org/10.1103/PhysRevLett.96.076402
Publication status	Published - 2006
Externally published	Yes

ASJC Scopus subject areas

Physics and Astronomy(all)

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Eguchi, R., Kiss, T., Tsuda, S., Shimojima, T., Mizokami, T., Yokoya, T., Chainani, A., Shin, S., Inoue, I. H., Togashi, T., Watanabe, S., Zhang, C. Q., Chen, C. T., Arita, M., Shimada, K., Namatame, H., & Taniguchi, M. (2006). Bulk- and surface-sensitive high-resolution photoemission study of two mott-hubbard systems: SrVO3 and CaVO3. Physical Review Letters, 96(7), Article 076402. https://doi.org/10.1103/PhysRevLett.96.076402

Eguchi, R, Kiss, T, Tsuda, S, Shimojima, T, Mizokami, T, Yokoya, T, Chainani, A, Shin, S, Inoue, IH, Togashi, T, Watanabe, S, Zhang, CQ, Chen, CT, Arita, M, Shimada, K, Namatame, H & Taniguchi, M 2006, 'Bulk- and surface-sensitive high-resolution photoemission study of two mott-hubbard systems: SrVO3 and CaVO3', Physical Review Letters, vol. 96, no. 7, 076402. https://doi.org/10.1103/PhysRevLett.96.076402

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title = "Bulk- and surface-sensitive high-resolution photoemission study of two mott-hubbard systems: SrVO3 and CaVO3",

abstract = "We study the electronic structure of Mott-Hubbard systems SrVO3 and CaVO3 with bulk and surface-sensitive high-resolution photoemission spectroscopy, using a vacuum ultraviolet laser, synchrotron radiation, and a discharge lamp (hν=7-21eV). A systematic suppression of the density of states (DOS) within ∼0.2eV of the Fermi level (EF) is found on decreasing photon energy, i.e., on increasing bulk sensitivity. The coherent band in SrVO3 and CaVO3 is shown to consist of surface and bulk-derived features, separated in energy. The stronger distortion on surface of CaVO3 compared to SrVO3 leads to a higher surface metallicity in the coherent DOS at EF, consistent with recent theory.",

author = "R. Eguchi and T. Kiss and S. Tsuda and T. Shimojima and T. Mizokami and T. Yokoya and A. Chainani and S. Shin and Inoue, {I. H.} and T. Togashi and S. Watanabe and Zhang, {C. Q.} and Chen, {C. T.} and M. Arita and K. Shimada and H. Namatame and M. Taniguchi",

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doi = "10.1103/PhysRevLett.96.076402",

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AU - Eguchi, R.

AU - Kiss, T.

AU - Tsuda, S.

AU - Shimojima, T.

AU - Mizokami, T.

AU - Yokoya, T.

AU - Chainani, A.

AU - Shin, S.

AU - Inoue, I. H.

AU - Togashi, T.

AU - Watanabe, S.

AU - Zhang, C. Q.

AU - Chen, C. T.

AU - Arita, M.

AU - Shimada, K.

AU - Namatame, H.

AU - Taniguchi, M.

PY - 2006

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AB - We study the electronic structure of Mott-Hubbard systems SrVO3 and CaVO3 with bulk and surface-sensitive high-resolution photoemission spectroscopy, using a vacuum ultraviolet laser, synchrotron radiation, and a discharge lamp (hν=7-21eV). A systematic suppression of the density of states (DOS) within ∼0.2eV of the Fermi level (EF) is found on decreasing photon energy, i.e., on increasing bulk sensitivity. The coherent band in SrVO3 and CaVO3 is shown to consist of surface and bulk-derived features, separated in energy. The stronger distortion on surface of CaVO3 compared to SrVO3 leads to a higher surface metallicity in the coherent DOS at EF, consistent with recent theory.

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Bulk- and surface-sensitive high-resolution photoemission study of two mott-hubbard systems: SrVO3 and CaVO3

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