2019/01/10 by Mostafa Sherif Derbala Aly Hussein, Hussein, Mostafa Sherif Derbala Aly, Elbio Dagotto +3 · 1 citation
Materials Science · Physics and Astronomy · #Advanced Condensed Matter Physics #FOS: Physical sciences #Magnetic and transport properties of perovskites and related materials #Physics of Superconductivity and Magnetism #Superconductivity (cond-mat.supr-con)
paper · pdf · doi:10.48550/arxiv.1901.03320
openalex publication_date 2019/01/10 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
Using Monte Carlo techniques, we study a three-orbital CuO2 spin-fermion\nmodel for copper-based high critical temperature superconductors that captures\nthe charge-transfer properties of these compounds. Our studies reveal the\npresence of spin order in the parent compound and, more importantly, stripe\nspin and charge order under hole doping. Due to the p-d orbital hybridizati\non, the added holes are approximately equally distributed among the two p\norbitals of the oxygen atoms and the d orbital of the copper atoms in the\nunit cell. In rectangular clusters of dimension 16\× 4 %that break the\n\π/2 lattice rotational symmetry, it half-filled stripes are observed\nupon hole doping, namely when Nh=2n holes are introduced in the system then\nn stripes of length 4 are formed along the short direction. The original\nantiferromagnetic order observed in the parent compound develops a \π-shift\nacross each stripe and the magnetic structure factor has a peak at wavevector\n bf k=(\π-\δ,\π) with \δ=2\π Nh/N=\π Nh/2L, where L=16.\nThe electronic charge is also modulated and the charge structure factor is\nmaximized at bf k=(2\δ,0). As electrons are removed from the system,\nintracell orbital nematicity with \⟨ npx\⟩-\⟨\nnpy\⟩\≠ 0 dev elops in the oxygen sector, as well as intercell\nmagnetic nematicity with \⟨ Sz_ bf i,d(Sz_ bf i+ bf\nx,d-Sz_ bf i+ bf y,d)\⟩\≠ 0 in the spin copper sector, in the\nstandard notation. This occurs not only in rectangular but also in square\n8\×8 lattices. Overall, our results suggest that the essence of the\nstripe spin and charge distribution experimentally observed in hole-doped\ncuprates are captured by unbiased Monte Carlo studies of a simple hole-doped\ncharge-transfer insulator CuO2 spin-fermion model.\n