Paramagnon dispersion and damping in doped NaxCa2-xCuO2Cl2

Blair W. Lebert; Benjamin Bacq-Labreuil; Mark P.M. Dean; Kari Ruotsalainen; Alessandro Nicolaou; Simo Huotari; Ikuya Yamada; Hajime Yamamoto; Masaki Azuma; Nicholas B. Brookes; Flora Yakhou; Hu Miao; David Santos-Cottin; Benjamin Lenz; Silke Biermann; Matteo d'Astuto

doi:10.1103/PhysRevB.108.024506

Paramagnon dispersion and damping in doped Na_xCa_2-xCuO₂Cl₂

Blair W. Lebert, Benjamin Bacq-Labreuil, Mark P.M. Dean, Kari Ruotsalainen, Alessandro Nicolaou, Simo Huotari, Ikuya Yamada, Hajime Yamamoto, Masaki Azuma, Nicholas B. Brookes, Flora Yakhou, Hu Miao, David Santos-Cottin, Benjamin Lenz, Silke Biermann, Matteo d'Astuto

Quantum Heterostructures

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

1 Scopus citations

Abstract

Using resonant inelastic x-ray scattering, we measure the paramagnon dispersion and damping of undoped, antiferromagnetic Formula Presented as well as doped, superconducting Formula Presented. Our estimation of the spin-exchange parameter and width of the paramagnon peak at the zone boundary Formula Presented confirms that no simple relation can be drawn between these parameters and the critical temperature Formula Presented. Consistently with other cuprate compounds, we show that upon doping there is a slight softening at (0.25,0) but not at the zone boundary Formula Presented. In combination with these measurements we perform calculations of the dynamical spin structure factor of the one-band Hubbard model using cluster dynamical mean-field theory. The calculations are in excellent agreement with the experiment in the undoped case, both in terms of energy position and width. While the increase in width is also captured upon doping, the dynamical spin structure factor shows a sizable softening at Formula Presented, which provides insightful information on the length-scale of the spin fluctuations in doped cuprates.

Original language	English
Article number	024506
Journal	Physical Review B
Volume	108
Issue number	2
DOIs	https://doi.org/10.1103/PhysRevB.108.024506
State	Published - Jul 1 2023

Funding

The authors are grateful to Benoît Baptiste and Lise-Marie Chamoreau for their assistance in crystal orientation and acknowledge the use of the x-ray diffractometer instrument at the “Plateforme Diffraction”, IPCM, and IMPMC Paris. M.d'A. is very grateful to Marie-Aude Méasson, Giacomo Ghiringhelli, and Chafic Fawaz for critical reading of the manuscript. B.W.L. acknowledges financial support from the French state funds managed by the ANR within the “Investissements d'Avenir” programme under Reference No. ANR-11-IDEX-0004-02, and within the framework of the Cluster of Excellence MATISSE led by Sorbonne Université and from the LLB/SOLEIL PhD fellowship program. Work at Brookhaven National Laboratory was supported by the U.S. Department of Energy (DOE), Office of Science, Office of Basic Energy Sciences. B.B.-L. acknowledges funding through the Institut Polytechnique de Paris. S.H. was supported by Academy of Finland (Project No. 295696). We acknowledge the MPBT platform (Sorbonne University) for the use of its SQUID magnetometer. We acknowledge syncrotron beam-time and experiment financial support to ESRF through experiment HC-2702. We acknowledge supercomputing time at the French Grand Equipement National de Calcul Intensif IDRIS-GENCI Orsay (Project No. A0130901393) and we thank the CPHT computer support team.

Funders	Funder number
French Grand Equipement National de Calcul Intensif IDRIS-GENCI	A0130901393
IMPMC	ANR-11-IDEX-0004-02
U.S. Department of Energy
Office of Science
Basic Energy Sciences
Institut Polytechnique de Paris
European Synchrotron Radiation Facility	HC-2702
European Synchrotron Radiation Facility
Academy of Finland	295696
Academy of Finland
Sorbonne Université

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10.1103/PhysRevB.108.024506

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Lebert, B. W., Bacq-Labreuil, B., Dean, M. P. M., Ruotsalainen, K., Nicolaou, A., Huotari, S., Yamada, I., Yamamoto, H., Azuma, M., Brookes, N. B., Yakhou, F., Miao, H., Santos-Cottin, D., Lenz, B., Biermann, S., & d'Astuto, M. (2023). Paramagnon dispersion and damping in doped Na_xCa_2-xCuO₂Cl₂. Physical Review B, 108(2), Article 024506. https://doi.org/10.1103/PhysRevB.108.024506

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title = "Paramagnon dispersion and damping in doped NaxCa2-xCuO2Cl2",

abstract = "Using resonant inelastic x-ray scattering, we measure the paramagnon dispersion and damping of undoped, antiferromagnetic Formula Presented as well as doped, superconducting Formula Presented. Our estimation of the spin-exchange parameter and width of the paramagnon peak at the zone boundary Formula Presented confirms that no simple relation can be drawn between these parameters and the critical temperature Formula Presented. Consistently with other cuprate compounds, we show that upon doping there is a slight softening at (0.25,0) but not at the zone boundary Formula Presented. In combination with these measurements we perform calculations of the dynamical spin structure factor of the one-band Hubbard model using cluster dynamical mean-field theory. The calculations are in excellent agreement with the experiment in the undoped case, both in terms of energy position and width. While the increase in width is also captured upon doping, the dynamical spin structure factor shows a sizable softening at Formula Presented, which provides insightful information on the length-scale of the spin fluctuations in doped cuprates.",

author = "Lebert, {Blair W.} and Benjamin Bacq-Labreuil and Dean, {Mark P.M.} and Kari Ruotsalainen and Alessandro Nicolaou and Simo Huotari and Ikuya Yamada and Hajime Yamamoto and Masaki Azuma and Brookes, {Nicholas B.} and Flora Yakhou and Hu Miao and David Santos-Cottin and Benjamin Lenz and Silke Biermann and Matteo d'Astuto",

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AU - Lebert, Blair W.

AU - Bacq-Labreuil, Benjamin

AU - Dean, Mark P.M.

AU - Ruotsalainen, Kari

AU - Nicolaou, Alessandro

AU - Huotari, Simo

AU - Yamada, Ikuya

AU - Yamamoto, Hajime

AU - Azuma, Masaki

AU - Brookes, Nicholas B.

AU - Yakhou, Flora

AU - Miao, Hu

AU - Santos-Cottin, David

AU - Lenz, Benjamin

AU - Biermann, Silke

AU - d'Astuto, Matteo

PY - 2023/7/1

Y1 - 2023/7/1

N2 - Using resonant inelastic x-ray scattering, we measure the paramagnon dispersion and damping of undoped, antiferromagnetic Formula Presented as well as doped, superconducting Formula Presented. Our estimation of the spin-exchange parameter and width of the paramagnon peak at the zone boundary Formula Presented confirms that no simple relation can be drawn between these parameters and the critical temperature Formula Presented. Consistently with other cuprate compounds, we show that upon doping there is a slight softening at (0.25,0) but not at the zone boundary Formula Presented. In combination with these measurements we perform calculations of the dynamical spin structure factor of the one-band Hubbard model using cluster dynamical mean-field theory. The calculations are in excellent agreement with the experiment in the undoped case, both in terms of energy position and width. While the increase in width is also captured upon doping, the dynamical spin structure factor shows a sizable softening at Formula Presented, which provides insightful information on the length-scale of the spin fluctuations in doped cuprates.

AB - Using resonant inelastic x-ray scattering, we measure the paramagnon dispersion and damping of undoped, antiferromagnetic Formula Presented as well as doped, superconducting Formula Presented. Our estimation of the spin-exchange parameter and width of the paramagnon peak at the zone boundary Formula Presented confirms that no simple relation can be drawn between these parameters and the critical temperature Formula Presented. Consistently with other cuprate compounds, we show that upon doping there is a slight softening at (0.25,0) but not at the zone boundary Formula Presented. In combination with these measurements we perform calculations of the dynamical spin structure factor of the one-band Hubbard model using cluster dynamical mean-field theory. The calculations are in excellent agreement with the experiment in the undoped case, both in terms of energy position and width. While the increase in width is also captured upon doping, the dynamical spin structure factor shows a sizable softening at Formula Presented, which provides insightful information on the length-scale of the spin fluctuations in doped cuprates.

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Paramagnon dispersion and damping in doped Na_xCa_2-xCuO₂Cl₂

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