"Ultrafast control of electronic interactions in low-dimensional cuprate superconductors"

ORAL  · Invited

Abstract

Intense ultrashort electromagnetic fields are an increasingly important tool to realize and control novel emergent phases in quantum materials. Among a variety of nonthermal excitation pathways, a particularly intriguing route is represented by the direct light-engineering of effective many-body interactions, such as electron hopping amplitudes and electron-electron repulsion. Achieving a light-induced dynamical renormalization of the screened onsite Coulomb repulsion (“Hubbard U”) has far-reaching implications for the ultrafast manipulation of superconductivity and magnetism in the solid state. In this talk, I will discuss the light-induced renormalization of the Hubbard U in two cuprate superconductors – the quasi-1D compound Sr2CuO3+d, and the quasi-2D La2-xBaxCuO4 – and discuss its implications for the control of superconductivity, magnetism, as well as to the realization of other long-range-ordered phases in light-driven quantum materials.



*This study was supported by the DOE Office of Science under the Early Career Research Program award No. DE-SC0022883. Use of the Linac Coherent Light Source (LCLS), SLAC National Accelerator Laboratory, is supported by the U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences under Contract No. DE-AC02-76SF00515. Work at Brookhaven National Laboratory was supported by the U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences. M. M. acknowledges support by the William F. Milton Fund and by the Aramont Fellowship Fund for Emerging Science Research at Harvard University. D. R. B. acknowledges support from the Swiss National Science Foundation through Project No. P400P2_194343. This research used resources of the National Energy Research Scientific Computing Center (NERSC), a U.S. Department of Energy Office of Science User Facility operated under Contract No. DE-AC02- 05CH11231.

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Publication: D. R. Baykusheva et al. Ultrafast renormalization of the on-site Coulomb repulsion in a cuprate superconductor. Phys. Rev. X 12, 011013 (2022)
D. R. Baykusheva et al. Floquet engineered electronic interactions in a quantum spin chain, forthcoming (2023)

Presenters

  • Matteo Mitrano

    • Harvard University

Authors

  • Matteo Mitrano

    • Harvard University