Robust charge-density-wave correlations in the electron-doped single-band Hubbard model

Peizhi Mai; Nathan S Nichols; Seher Karakuzu; Feng Bao; Adrian Del Maestro; Thomas A Maier; Steven Johnston

doi:10.1038/s41467-023-38566-7

Robust charge-density-wave correlations in the electron-doped single-band Hubbard model

Nat Commun. 2023 May 20;14(1):2889. doi: 10.1038/s41467-023-38566-7.

Authors

Peizhi Mai^{1

2}, Nathan S Nichols³, Seher Karakuzu^{1

4}, Feng Bao⁵, Adrian Del Maestro^{6

7

8}, Thomas A Maier¹, Steven Johnston^{9

10}

Affiliations

¹ Computational Sciences and Engineering Division, Oak Ridge National Laboratory, Oak Ridge, TN, 37831-6494, USA.
² Department of Physics and Institute of Condensed Matter Theory, University of Illinois at Urbana-Champaign, Urbana, IL, 61801, USA.
³ Data Science and Learning Division, Argonne National Laboratory, Argonne, IL, 60439, USA.
⁴ Center for Computational Quantum Physics, Flatiron Institute, 162 5th Avenue, New York, NY, 10010, USA.
⁵ Department of Mathematics, Florida State University, Tallahassee, FL, 32306, USA.
⁶ Department of Physics and Astronomy, The University of Tennessee, Knoxville, TN, 37996, USA.
⁷ Institute of Advanced Materials and Manufacturing, The University of Tennessee, Knoxville, TN, 37996, USA.
⁸ Min H. Kao Department of Electrical Engineering and Computer Science, University of Tennessee, Knoxville, TN, 37996, USA.
⁹ Department of Physics and Astronomy, The University of Tennessee, Knoxville, TN, 37996, USA. sjohn145@utk.edu.
¹⁰ Institute of Advanced Materials and Manufacturing, The University of Tennessee, Knoxville, TN, 37996, USA. sjohn145@utk.edu.

Abstract

There is growing evidence that the hole-doped single-band Hubbard and t - J models do not have a superconducting ground state reflective of the high-temperature cuprate superconductors but instead have striped spin- and charge-ordered ground states. Nevertheless, it is proposed that these models may still provide an effective low-energy model for electron-doped materials. Here we study the finite temperature spin and charge correlations in the electron-doped Hubbard model using quantum Monte Carlo dynamical cluster approximation calculations and contrast their behavior with those found on the hole-doped side of the phase diagram. We find evidence for a charge modulation with both checkerboard and unidirectional components decoupled from any spin-density modulations. These correlations are inconsistent with a weak-coupling description based on Fermi surface nesting, and their doping dependence agrees qualitatively with resonant inelastic x-ray scattering measurements. Our results provide evidence that the single-band Hubbard model describes the electron-doped cuprates.