Disorder effects on the phase diagram of electron-doped cuprates using the two-particle self-consistent approach

The two-particle self-consistent approach (TPSC) is an accurate theoretical method for electronic systems that can be described by the one-band Hubbard model in the weak to intermediate coupling regime [1, 2]. In particular, it can successfully describe the electron-doped cuprates [3]. In this work, we include the effect of impurities and disorder in TPSC using the impurity averaging technique and apply it to the specific case of electron-doped cuprates. We show how disorder suppresses antiferromagnetic (AFM) fluctuations using spin correlation length and double occupancy calculations. We also show that disorder displaces the AFM quantum critical point to a smaller value of the electron doping and affects the onset of the AFM pseudogap.

[1] Vilk, Y. M. et Tremblay, A.-M. S. J. Phys. I France 7, 1309–1368 (1997).

[2] Schäfer, T. et al. Phys. Rev. X 11, 011058 (2021).

[3] Kyung, B., Hankevych, V., Daré, A.-M. et Tremblay, A.-M. S. Phys. Rev. Lett. 93, 147004 (2004).