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Paramagnon dispersion and damping in doped NaxCa2-xCuO2Cl2

Lebert, Blair W. ; Bacq-Labreuil, Benjamin ; Dean, Mark P.M. ; Ruotsalainen, Kari ; Nicolaou, Alessandro ; Huotari, Simo ; Yamada, Ikuya ; Yamamoto, Hajime ; Azuma, Masaki and Brookes, Nicholas B. , et al. (2023) In Physical Review B 108(2).
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... (More)

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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organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Physical Review B
volume
108
issue
2
article number
024506
publisher
American Physical Society
external identifiers
  • scopus:85165638344
ISSN
2469-9950
DOI
10.1103/PhysRevB.108.024506
language
English
LU publication?
yes
id
2c6a147f-4aca-4852-a28b-25a1569cef2a
date added to LUP
2023-12-21 12:51:57
date last changed
2023-12-21 12:52:15
@article{2c6a147f-4aca-4852-a28b-25a1569cef2a,
  abstract     = {{<p>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.</p>}},
  author       = {{Lebert, Blair W. and Bacq-Labreuil, Benjamin and Dean, Mark P.M. and Ruotsalainen, Kari and Nicolaou, Alessandro and Huotari, Simo and Yamada, Ikuya and Yamamoto, Hajime and Azuma, Masaki and Brookes, Nicholas B. and Yakhou, Flora and Miao, Hu and Santos-Cottin, David and Lenz, Benjamin and Biermann, Silke and d'Astuto, Matteo}},
  issn         = {{2469-9950}},
  language     = {{eng}},
  month        = {{07}},
  number       = {{2}},
  publisher    = {{American Physical Society}},
  series       = {{Physical Review B}},
  title        = {{Paramagnon dispersion and damping in doped Na<sub>x</sub>Ca<sub>2-x</sub>CuO<sub>2</sub>Cl<sub>2</sub>}},
  url          = {{http://dx.doi.org/10.1103/PhysRevB.108.024506}},
  doi          = {{10.1103/PhysRevB.108.024506}},
  volume       = {{108}},
  year         = {{2023}},
}