Collective charge modes in quasi-1D Mott insulator SrCuO2

L. Wray; D. Qian; Y. W. Li; H. Eisaki; M. Z. Hasan

doi:10.1016/j.physc.2007.03.291

Collective charge modes in quasi-1D Mott insulator SrCuO₂

L. Wray, D. Qian, Y. W. Li, H. Eisaki, M. Z. Hasan

Research output: Contribution to journal › Article › peer-review

Abstract

Inelastic resonant X-ray scattering is carried out on SrCuO₂, a model quasi one-dimensional spin 1/2 Mott insulator. Tuning excitation energy to a previously unstudied resonance allows insight into the effect of the intermediate state coupling to the fundamental charge modes exhibited by the sample. Redistribution of momentum and energy resolved spectral weight at the new resonance permits identification of features resembling the strong coupling prediction for the modes. Despite expected resonance enhancement, no spinon-like modes are observed above 0.5 eV (two-spinon threshold) in the measured scattering spectra.

Original language	English (US)
Pages (from-to)	460-461
Number of pages	2
Journal	Physica C: Superconductivity and its applications
Volume	460-462 I
Issue number	SPEC. ISS.
DOIs	https://doi.org/10.1016/j.physc.2007.03.291
State	Published - Sep 1 2007

Keywords

Mott insulators
Parent cuprates
Spin-charge separation
Superconductivity

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Energy Engineering and Power Technology
Electrical and Electronic Engineering

Access to Document

10.1016/j.physc.2007.03.291

Cite this

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title = "Collective charge modes in quasi-1D Mott insulator SrCuO2",

abstract = "Inelastic resonant X-ray scattering is carried out on SrCuO2, a model quasi one-dimensional spin 1/2 Mott insulator. Tuning excitation energy to a previously unstudied resonance allows insight into the effect of the intermediate state coupling to the fundamental charge modes exhibited by the sample. Redistribution of momentum and energy resolved spectral weight at the new resonance permits identification of features resembling the strong coupling prediction for the modes. Despite expected resonance enhancement, no spinon-like modes are observed above 0.5 eV (two-spinon threshold) in the measured scattering spectra.",

keywords = "Mott insulators, Parent cuprates, Spin-charge separation, Superconductivity",

author = "L. Wray and D. Qian and Li, {Y. W.} and H. Eisaki and Hasan, {M. Z.}",

note = "Funding Information: This work is supported by DOE/DE-FG02-05ER46200 and ALS-LBNL/DE-AC03-76SF00098.",

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T1 - Collective charge modes in quasi-1D Mott insulator SrCuO2

AU - Wray, L.

AU - Qian, D.

AU - Li, Y. W.

AU - Eisaki, H.

AU - Hasan, M. Z.

N1 - Funding Information: This work is supported by DOE/DE-FG02-05ER46200 and ALS-LBNL/DE-AC03-76SF00098.

PY - 2007/9/1

Y1 - 2007/9/1

N2 - Inelastic resonant X-ray scattering is carried out on SrCuO2, a model quasi one-dimensional spin 1/2 Mott insulator. Tuning excitation energy to a previously unstudied resonance allows insight into the effect of the intermediate state coupling to the fundamental charge modes exhibited by the sample. Redistribution of momentum and energy resolved spectral weight at the new resonance permits identification of features resembling the strong coupling prediction for the modes. Despite expected resonance enhancement, no spinon-like modes are observed above 0.5 eV (two-spinon threshold) in the measured scattering spectra.

AB - Inelastic resonant X-ray scattering is carried out on SrCuO2, a model quasi one-dimensional spin 1/2 Mott insulator. Tuning excitation energy to a previously unstudied resonance allows insight into the effect of the intermediate state coupling to the fundamental charge modes exhibited by the sample. Redistribution of momentum and energy resolved spectral weight at the new resonance permits identification of features resembling the strong coupling prediction for the modes. Despite expected resonance enhancement, no spinon-like modes are observed above 0.5 eV (two-spinon threshold) in the measured scattering spectra.

KW - Mott insulators

KW - Parent cuprates

KW - Spin-charge separation

KW - Superconductivity

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