X-ray imaging of dispersive charge modes in a doped Mott insulator near the antiferromagnet/superconductor transition

Y. W. Li, D. Qian, L. Wray, D. Hsieh, Y. Xia, Y. Kaga, T. Sasagawa, H. Takagi, R. S. Markiewicz, A. Bansil, H. Eisaki, S. Uchida, M. Z. Hasan

    Research output: Contribution to journalArticle

    Abstract

    Momentum-resolved inelastic resonant x-ray scattering is used to map the doping evolution of bulk electronic modes in the doped Mott insulator class Nd2-x Cex CuO4. As the doping induced antiferromagnet/superconductor (AFM/SC) transition is approached, we observe an anisotropic redistribution of the spectral weight of collective excitations over a large energy scale along the Γ→ (π,π) direction, whereas the modes exhibit broadening (∼1eV) with relatively little softening along Γ→ (π,0) with respect to the parent Mott state (x=0). Our study reveals a closing of the charge gap in the vicinity of the zone center even though the mode softening and spectral redistribution involve an unusually large energy scale over the full Brillouin zone. The collective behavior of modes in the vicinity of the AFM/SC critical transition is demonstrated.

    Original languageEnglish (US)
    Article number073104
    JournalPhysical Review B - Condensed Matter and Materials Physics
    Volume78
    Issue number7
    DOIs
    StatePublished - Aug 15 2008

    Fingerprint

    Superconducting materials
    Doping (additives)
    insulators
    Imaging techniques
    X rays
    softening
    Momentum
    x rays
    Scattering
    closing
    x ray scattering
    Brillouin zones
    momentum
    energy
    electronics
    excitation
    Direction compound

    ASJC Scopus subject areas

    • Condensed Matter Physics

    Cite this

    X-ray imaging of dispersive charge modes in a doped Mott insulator near the antiferromagnet/superconductor transition. / Li, Y. W.; Qian, D.; Wray, L.; Hsieh, D.; Xia, Y.; Kaga, Y.; Sasagawa, T.; Takagi, H.; Markiewicz, R. S.; Bansil, A.; Eisaki, H.; Uchida, S.; Hasan, M. Z.

    In: Physical Review B - Condensed Matter and Materials Physics, Vol. 78, No. 7, 073104, 15.08.2008.

    Research output: Contribution to journalArticle

    Li, YW, Qian, D, Wray, L, Hsieh, D, Xia, Y, Kaga, Y, Sasagawa, T, Takagi, H, Markiewicz, RS, Bansil, A, Eisaki, H, Uchida, S & Hasan, MZ 2008, 'X-ray imaging of dispersive charge modes in a doped Mott insulator near the antiferromagnet/superconductor transition', Physical Review B - Condensed Matter and Materials Physics, vol. 78, no. 7, 073104. https://doi.org/10.1103/PhysRevB.78.073104
    Li, Y. W. ; Qian, D. ; Wray, L. ; Hsieh, D. ; Xia, Y. ; Kaga, Y. ; Sasagawa, T. ; Takagi, H. ; Markiewicz, R. S. ; Bansil, A. ; Eisaki, H. ; Uchida, S. ; Hasan, M. Z. / X-ray imaging of dispersive charge modes in a doped Mott insulator near the antiferromagnet/superconductor transition. In: Physical Review B - Condensed Matter and Materials Physics. 2008 ; Vol. 78, No. 7.
    @article{d5cef3de760e421f86b26e130b67ba7e,
    title = "X-ray imaging of dispersive charge modes in a doped Mott insulator near the antiferromagnet/superconductor transition",
    abstract = "Momentum-resolved inelastic resonant x-ray scattering is used to map the doping evolution of bulk electronic modes in the doped Mott insulator class Nd2-x Cex CuO4. As the doping induced antiferromagnet/superconductor (AFM/SC) transition is approached, we observe an anisotropic redistribution of the spectral weight of collective excitations over a large energy scale along the Γ→ (π,π) direction, whereas the modes exhibit broadening (∼1eV) with relatively little softening along Γ→ (π,0) with respect to the parent Mott state (x=0). Our study reveals a closing of the charge gap in the vicinity of the zone center even though the mode softening and spectral redistribution involve an unusually large energy scale over the full Brillouin zone. The collective behavior of modes in the vicinity of the AFM/SC critical transition is demonstrated.",
    author = "Li, {Y. W.} and D. Qian and L. Wray and D. Hsieh and Y. Xia and Y. Kaga and T. Sasagawa and H. Takagi and Markiewicz, {R. S.} and A. Bansil and H. Eisaki and S. Uchida and Hasan, {M. Z.}",
    year = "2008",
    month = "8",
    day = "15",
    doi = "10.1103/PhysRevB.78.073104",
    language = "English (US)",
    volume = "78",
    journal = "Physical Review B-Condensed Matter",
    issn = "1098-0121",
    publisher = "American Physical Society",
    number = "7",

    }

    TY - JOUR

    T1 - X-ray imaging of dispersive charge modes in a doped Mott insulator near the antiferromagnet/superconductor transition

    AU - Li, Y. W.

    AU - Qian, D.

    AU - Wray, L.

    AU - Hsieh, D.

    AU - Xia, Y.

    AU - Kaga, Y.

    AU - Sasagawa, T.

    AU - Takagi, H.

    AU - Markiewicz, R. S.

    AU - Bansil, A.

    AU - Eisaki, H.

    AU - Uchida, S.

    AU - Hasan, M. Z.

    PY - 2008/8/15

    Y1 - 2008/8/15

    N2 - Momentum-resolved inelastic resonant x-ray scattering is used to map the doping evolution of bulk electronic modes in the doped Mott insulator class Nd2-x Cex CuO4. As the doping induced antiferromagnet/superconductor (AFM/SC) transition is approached, we observe an anisotropic redistribution of the spectral weight of collective excitations over a large energy scale along the Γ→ (π,π) direction, whereas the modes exhibit broadening (∼1eV) with relatively little softening along Γ→ (π,0) with respect to the parent Mott state (x=0). Our study reveals a closing of the charge gap in the vicinity of the zone center even though the mode softening and spectral redistribution involve an unusually large energy scale over the full Brillouin zone. The collective behavior of modes in the vicinity of the AFM/SC critical transition is demonstrated.

    AB - Momentum-resolved inelastic resonant x-ray scattering is used to map the doping evolution of bulk electronic modes in the doped Mott insulator class Nd2-x Cex CuO4. As the doping induced antiferromagnet/superconductor (AFM/SC) transition is approached, we observe an anisotropic redistribution of the spectral weight of collective excitations over a large energy scale along the Γ→ (π,π) direction, whereas the modes exhibit broadening (∼1eV) with relatively little softening along Γ→ (π,0) with respect to the parent Mott state (x=0). Our study reveals a closing of the charge gap in the vicinity of the zone center even though the mode softening and spectral redistribution involve an unusually large energy scale over the full Brillouin zone. The collective behavior of modes in the vicinity of the AFM/SC critical transition is demonstrated.

    UR - http://www.scopus.com/inward/record.url?scp=50049087923&partnerID=8YFLogxK

    UR - http://www.scopus.com/inward/citedby.url?scp=50049087923&partnerID=8YFLogxK

    U2 - 10.1103/PhysRevB.78.073104

    DO - 10.1103/PhysRevB.78.073104

    M3 - Article

    VL - 78

    JO - Physical Review B-Condensed Matter

    JF - Physical Review B-Condensed Matter

    SN - 1098-0121

    IS - 7

    M1 - 073104

    ER -