Тип публикации: статья из журнала
Год издания: 2010
Идентификатор DOI: 10.1088/0953-8984/22/1/015701
Ключевые слова: Antiferromagnetics, Doping evolution, Electron-doped, Electronic correlation, Emery model, Experimental data, Generalized tight bindings, High-T, Hybrid scheme, Magnetic orders, Spin-liquid, Tight binding model, Two-regime, Antiferromagnetism, Cerium, Cerium compounds, Copper oxides, Corundum, Doping (additives), Fermi surface, Fermions, Tin, Surfaces
Аннотация: Using a LDA + GTB (local density approximation + generalized tight-binding) hybrid scheme we investigate the band structure of the electron-doped high-T-c material Sm2-xCexCuO4. Parameters of the minimal tight-binding model for this system (the so-called three-band Emery model) were obtained within the NMTO (Nth-order muffin-tin orПоказать полностьюbital) method. The doping evolution of the dispersion and the 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.
Журнал: JOURNAL OF PHYSICS-CONDENSED MATTER
Выпуск журнала: Vol. 22, Is. 1
ISSN журнала: 09538984
Место издания: BRISTOL
Издатель: IOP PUBLISHING LTD