Orbital ordering transition in the single-layer manganites near half doping: a weak-coupling approach
نویسندگان
چکیده
منابع مشابه
Disorder-induced orbital ordering in doped manganites
Sanjeev Kumar1,2 and Arno P. Kampf3 1Faculty of Science and Technology, University of Twente, P.O. Box 217, 7500 AE Enschede, The Netherlands 2Instituut-Lorentz for Theoretical Physics, Leiden University, P.O. Box 9506, 2300 RA Leiden, The Netherlands 3Theoretical Physics III, Center for Electronic Correlations and Magnetism, Institute of Physics, University of Augsburg, D-86135 Augsburg, Germa...
متن کاملStrain selection of charge and orbital ordering patterns in half-doped manganites
Perovskite manganites of chemical formula Ln12xAkxMnO3 ~Ln is a lanthanide rare earth such as La or Pr; Ak is a divalent alkali such as Sr or Ca! present a complex phase diagram associated with the interplay of charge, spin, orbital, and lattice degrees of freedom. Charge and orbitally ordered phases appear in wide parameter ranges, for example, in La12xCaxMnO3 for x>0.5, and in Pr12xCaxMnO3 fo...
متن کاملMagnetic, orbital and charge ordering in the electron-doped manganites
The three dimensional perovskite manganites R1−xAxMnO3 in the range of holedoping x > 0.5 are studied in detail using a double exchange model with degenerate eg orbitals including intraand inter-orbital correlations and near-neighbour Coulomb repulsion. We show that such a model captures the observed phase diagram and orbital-ordering in the intermediate to large band-width regime. It is argued...
متن کاملOrbital-ordering transition in Sr2VO4.
Temperature-dependent dc susceptibility and x-ray powder diffraction on a pure tetragonal sample of Sr(2)VO(4) show an antiferromagnetic orbital-ordering transition at T(oo) = 97 K, in which the occupied orbitals lie along the c axis. The unusual broadening of the x-ray Bragg peaks throughout the orbital-ordering transition temperature region indicates that this process occurs in stages, and th...
متن کاملStripes induced by orbital ordering in layered manganites.
Spin-charge-orbital ordered structures in doped layered manganites are investigated using an orbital-degenerate double-exchange model tightly coupled to Jahn-Teller distortions. In the ferromagnetic phase, unexpected diagonal stripes at x = 1/m ( m = integer) are observed, as in recent experiments. These stripes are induced by the orbital degree of freedom, which forms a staggered pattern in th...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: The European Physical Journal B
سال: 2015
ISSN: 1434-6028,1434-6036
DOI: 10.1140/epjb/e2015-60044-3