Dispersion, damping, and intensity of spin excitations in the monolayer cuprate superconductor family
Abstract
Using Cu-$${L}_{3}$$ edge resonant inelastic x-ray scattering (RIXS) we measured here the dispersion and damping of spin excitations (magnons and paramagnons) in the high-$${T}_{\mathrm{c}}$$ superconductor $${(\text{Bi,Pb})}_{2}{(\text{Sr,La})}_{2}{\mathrm{CuO}}_{6+{\delta}}$$ (Bi2201), for a large doping range across the phase diagram $$(0.03{\lesssim}p{\lesssim}0.21)$$. Selected measurements with full polarization analysis unambiguously demonstrate the spin-flip character of these excitations, even in the overdoped sample. We find that the undamped frequencies increase slightly with doping for all accessible momenta, while the damping grows rapidly, faster in the $$(0,0){\rightarrow}(0.5,0.5)$$ nodal direction than in the $$(0,0){\rightarrow}(0.5,0)$$ antinodal direction. We compare the experimental results to numerically exact determinant quantum Monte Carlo (DQMC) calculations that provide the spin dynamical structure factor $$S(\mathbf{Q},{\omega})$$ of the three-band Hubbard model. The theory reproduces well the momentum and doping dependence of the dispersions and spectral weights of magnetic excitations. These results provide compelling evidence that paramagnons, although increasingly damped, persist across the superconducting dome of the cuprate phase diagram; this implies that long-range antiferromagnetic correlations are quickly washed away, while short-range magnetic interactions are little affected by doping.
- Authors:
-
- Politecnico di Milano (Italy). Dept. of Physics
- Stanford Univ., CA (United States). Dept. of Physics; SLAC National Accelerator Lab., Menlo Park, CA (United States). Stanford Inst. for Materials and Energy Sciences
- Max Planck Inst. for Solid State Research, Stuttgart (Germany)
- SLAC National Accelerator Lab., Menlo Park, CA (United States). Stanford Inst. for Materials and Energy Sciences; Harvard Univ., Cambridge, MA (United States). Dept. of Physics
- Chinese Academy of Sciences (CAS), Beijing (China). Beijing National Lab. for Condensed Matter Physics. Inst. of Physics
- European Synchrotron Radiation Facility (ESRF), Grenoble (France)
- SLAC National Accelerator Lab., Menlo Park, CA (United States). Stanford Inst. for Materials and Energy Sciences
- Politecnico di Milano (Italy). Dept. of Physics. Superconducting and Other Innovative Materials and Devices Inst. (CNR-SPIN)
- Publication Date:
- Research Org.:
- SLAC National Accelerator Lab., Menlo Park, CA (United States); Politecnico di Milano (Italy); Max Planck Inst. for Solid State Research, Stuttgart (Germany); Chinese Academy of Sciences (CAS), Beijing (China)
- Sponsoring Org.:
- USDOE Office of Science (SC), Basic Energy Sciences (BES); European Research Council (ERC); Alexander von Humboldt Foundation (Germany); National Natural Science Foundation of China (NSFC); National Key Research and Development Program of China; Chinese Academy of Sciences
- OSTI Identifier:
- 1490392
- Alternate Identifier(s):
- OSTI ID: 1477542
- Grant/Contract Number:
- AC02-76SF00515; AC02-05CH11231; 2016-0790; 11334010; 11534007; 2016YFA0300300; XDB07020300
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Physical Review B
- Additional Journal Information:
- Journal Volume: 98; Journal Issue: 14; Journal ID: ISSN 2469-9950
- Publisher:
- American Physical Society (APS)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; magnons; spin fluctuations; superconductivity; strongly correlated systems; unconventional superconductors; Monte Carlo methods; resonant inelastic x-ray scattering
Citation Formats
Peng, Y. Y., Huang, E. W., Fumagalli, R., Minola, M., Wang, Y., Sun, X., Ding, Y., Kummer, K., Zhou, X. J., Brookes, N. B., Moritz, B., Braicovich, L., Devereaux, T. P., and Ghiringhelli, G. Dispersion, damping, and intensity of spin excitations in the monolayer (Bi,Pb)2(Sr,La)2CuO6+δ cuprate superconductor family. United States: N. p., 2018.
Web. doi:10.1103/physrevb.98.144507.
Peng, Y. Y., Huang, E. W., Fumagalli, R., Minola, M., Wang, Y., Sun, X., Ding, Y., Kummer, K., Zhou, X. J., Brookes, N. B., Moritz, B., Braicovich, L., Devereaux, T. P., & Ghiringhelli, G. Dispersion, damping, and intensity of spin excitations in the monolayer (Bi,Pb)2(Sr,La)2CuO6+δ cuprate superconductor family. United States. https://doi.org/10.1103/physrevb.98.144507
Peng, Y. Y., Huang, E. W., Fumagalli, R., Minola, M., Wang, Y., Sun, X., Ding, Y., Kummer, K., Zhou, X. J., Brookes, N. B., Moritz, B., Braicovich, L., Devereaux, T. P., and Ghiringhelli, G. Wed .
"Dispersion, damping, and intensity of spin excitations in the monolayer (Bi,Pb)2(Sr,La)2CuO6+δ cuprate superconductor family". United States. https://doi.org/10.1103/physrevb.98.144507. https://www.osti.gov/servlets/purl/1490392.
@article{osti_1490392,
title = {Dispersion, damping, and intensity of spin excitations in the monolayer (Bi,Pb)2(Sr,La)2CuO6+δ cuprate superconductor family},
author = {Peng, Y. Y. and Huang, E. W. and Fumagalli, R. and Minola, M. and Wang, Y. and Sun, X. and Ding, Y. and Kummer, K. and Zhou, X. J. and Brookes, N. B. and Moritz, B. and Braicovich, L. and Devereaux, T. P. and Ghiringhelli, G.},
abstractNote = {Using Cu-${L}_{3}$ edge resonant inelastic x-ray scattering (RIXS) we measured here the dispersion and damping of spin excitations (magnons and paramagnons) in the high-${T}_{\mathrm{c}}$ superconductor ${(\text{Bi,Pb})}_{2}{(\text{Sr,La})}_{2}{\mathrm{CuO}}_{6+{\delta}}$ (Bi2201), for a large doping range across the phase diagram $(0.03{\lesssim}p{\lesssim}0.21)$. Selected measurements with full polarization analysis unambiguously demonstrate the spin-flip character of these excitations, even in the overdoped sample. We find that the undamped frequencies increase slightly with doping for all accessible momenta, while the damping grows rapidly, faster in the $(0,0){\rightarrow}(0.5,0.5)$ nodal direction than in the $(0,0){\rightarrow}(0.5,0)$ antinodal direction. We compare the experimental results to numerically exact determinant quantum Monte Carlo (DQMC) calculations that provide the spin dynamical structure factor $S(\mathbf{Q},{\omega})$ of the three-band Hubbard model. The theory reproduces well the momentum and doping dependence of the dispersions and spectral weights of magnetic excitations. These results provide compelling evidence that paramagnons, although increasingly damped, persist across the superconducting dome of the cuprate phase diagram; this implies that long-range antiferromagnetic correlations are quickly washed away, while short-range magnetic interactions are little affected by doping.},
doi = {10.1103/physrevb.98.144507},
journal = {Physical Review B},
number = 14,
volume = 98,
place = {United States},
year = {Wed Oct 10 00:00:00 EDT 2018},
month = {Wed Oct 10 00:00:00 EDT 2018}
}
Web of Science
Figures / Tables:
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