2012/07/14 by A. Sherman, Sherman, A.
Materials Science · Physics and Astronomy · #Advanced Chemical Physics Studies #FOS: Physical sciences #Magnetic and transport properties of perovskites and related materials #Physics of Superconductivity and Magnetism #Strongly Correlated Electrons (cond-mat.str-el) #Superconductivity (cond-mat.supr-con) #cond-mat.str-el #cond-mat.supr-con
paper · pdf · doi:10.48550/arxiv.1207.3405
7 pages, 6 figures
arxiv created 2012/07/14 · openalex publication_date 2012/07/14 · arxiv updated 2012/07/17 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
The magnetic susceptibility of the optimally doped Pr1-xLaCexCuO4 in the superconducting state is calculated using the t-J model of Cu-O planes, Mori's projection operator technique and the dispersion of electron bands derived from photoemission experiments. The electron band folding across the antiferromagnetic Brillouin zone border, which is inherent in the crystal, leads to a commensurate low-frequency response. The same band folding causes the appearance of a supplementary spin-excitation branch. The coexistence of the two spin-excitation branches explains two maxima observed in the frequency dependence of the susceptibility. The calculated momentum and frequency dependencies are close to experimental observations. Similarities and differences in the magnetic responses of electron- and hole-doped cuprates are discussed.