The Fermi surface and the role of electronic correlations in Sm2-xCexCuO4

Описание

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.

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Издание

Журнал: JOURNAL OF PHYSICS-CONDENSED MATTER

Выпуск журнала: Vol. 22, Is. 1

ISSN журнала: 09538984

Место издания: BRISTOL

Издатель: IOP PUBLISHING LTD

Авторы

  • Korshunov M.M. (L v Kirensky Institute of Physics,Siberian Branch,Russian Academy of Sciences)
  • Zakharova E.V. (L v Kirensky Institute of Physics,Siberian Branch,Russian Academy of Sciences)
  • Ovchinnikov S.G. (Siberian Federal University)
  • Nekrasov I.A. (Institute for Electrophysics,Russian Academy of Sciences)
  • Pchelkina Z.V. (Institute for Metal Physics,Russian Academy of Sciences)

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