Unique identification of Zhang-Rice singlet excitation in Sr2CuO2Cl2 mediated by the O 1s core hole: Symmetry-selective resonant soft x-ray Raman scattering study

Yoshihisa Harada; Kozo Okada; Ritsuko Eguchi; Akio Kotani; Hidenori Takagi; Tomoyuki Takeuchi; Shik Shin

Unique identification of Zhang-Rice singlet excitation in Sr₂CuO₂Cl₂ mediated by the O 1s core hole: Symmetry-selective resonant soft x-ray Raman scattering study

Yoshihisa Harada, Kozo Okada, Ritsuko Eguchi, Akio Kotani, Hidenori Takagi, Tomoyuki Takeuchi, Shik Shin

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

Abstract

Zhang-Rice singlet excitation around 2 eV is observed, distinguished from Cu dd excitations, by a symmetry selective resonant soft x-ray Raman scattering (RSXRS) experiments at the O 1s edge excitation of Sr₂CuO₂Cl₂. Well below Néel temperature the initial state of Sr₂CuO₂Cl₂ is antiferromagnetic, and then the final state with the Zhang-Rice singlet is excited selectively when the photon polarization is conserved in the RSXRS process. We also observe a weak RSXRS structures around 0.5 eV in the controversial midinfrared region, taking advantage of extremely weak elastic scattering intensity in the O 1s edge. From its polarization dependence, it is interpreted to originate mainly from the two-spin-flip excitations.

Original language	English
Article number	165104
Pages (from-to)	1651041-1651045
Number of pages	5
Journal	Physical Review B - Condensed Matter and Materials Physics
Volume	66
Issue number	16
Publication status	Published - Oct 15 2002

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics

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Unique identification of Zhang-Rice singlet excitation in Sr₂CuO₂Cl₂ mediated by the O 1s core hole : Symmetry-selective resonant soft x-ray Raman scattering study. / Harada, Yoshihisa; Okada, Kozo ; Eguchi, Ritsuko et al.

In: Physical Review B - Condensed Matter and Materials Physics, Vol. 66, No. 16, 165104, 15.10.2002, p. 1651041-1651045.

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

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abstract = "Zhang-Rice singlet excitation around 2 eV is observed, distinguished from Cu dd excitations, by a symmetry selective resonant soft x-ray Raman scattering (RSXRS) experiments at the O 1s edge excitation of Sr2CuO2Cl2. Well below N{\'e}el temperature the initial state of Sr2CuO2Cl2 is antiferromagnetic, and then the final state with the Zhang-Rice singlet is excited selectively when the photon polarization is conserved in the RSXRS process. We also observe a weak RSXRS structures around 0.5 eV in the controversial midinfrared region, taking advantage of extremely weak elastic scattering intensity in the O 1s edge. From its polarization dependence, it is interpreted to originate mainly from the two-spin-flip excitations.",

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AU - Harada, Yoshihisa

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AU - Eguchi, Ritsuko

AU - Kotani, Akio

AU - Takagi, Hidenori

AU - Takeuchi, Tomoyuki

AU - Shin, Shik

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N2 - Zhang-Rice singlet excitation around 2 eV is observed, distinguished from Cu dd excitations, by a symmetry selective resonant soft x-ray Raman scattering (RSXRS) experiments at the O 1s edge excitation of Sr2CuO2Cl2. Well below Néel temperature the initial state of Sr2CuO2Cl2 is antiferromagnetic, and then the final state with the Zhang-Rice singlet is excited selectively when the photon polarization is conserved in the RSXRS process. We also observe a weak RSXRS structures around 0.5 eV in the controversial midinfrared region, taking advantage of extremely weak elastic scattering intensity in the O 1s edge. From its polarization dependence, it is interpreted to originate mainly from the two-spin-flip excitations.

AB - Zhang-Rice singlet excitation around 2 eV is observed, distinguished from Cu dd excitations, by a symmetry selective resonant soft x-ray Raman scattering (RSXRS) experiments at the O 1s edge excitation of Sr2CuO2Cl2. Well below Néel temperature the initial state of Sr2CuO2Cl2 is antiferromagnetic, and then the final state with the Zhang-Rice singlet is excited selectively when the photon polarization is conserved in the RSXRS process. We also observe a weak RSXRS structures around 0.5 eV in the controversial midinfrared region, taking advantage of extremely weak elastic scattering intensity in the O 1s edge. From its polarization dependence, it is interpreted to originate mainly from the two-spin-flip excitations.

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Unique identification of Zhang-Rice singlet excitation in Sr₂CuO₂Cl₂ mediated by the O 1s core hole: Symmetry-selective resonant soft x-ray Raman scattering study

Abstract

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