The Fermi surface and the role of electronic correlations in Sm${}_{2-x}$Ce${}_x$CuO${}_4$

Abstract

Using LDA+GTB (local density approximation+generalized tight-binding) hybrid scheme we investigate the band structure of the electron-doped high-$T_c$ material Sm${}_{2-x}$Ce${}_x$CuO${}_4$. Parameters of the minimal tight-binding model for this system (the so-called 3-band Emery model) were obtained within the NMTO ($N$-th order Muffin-Tin orbital) method. Doping evolution of the dispersion and Fermi surface in the presence of electronic correlations was investigated in two regimes of magnetic order: short-range (spin-liquid) and long-range (antiferromagnetic metal). Each regime is characterized by the specific topologies of the Fermi surfaces and we discuss their relation to recent experimental data.

10 pages, 4 figures, 1 table, Published version

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Cited by in corpus (1)

• Doped high-Tc cuprate superconductors elucidated in the light of zeros and poles of electronic Green's function