Landau theory of stripe phases in cuprates and nickelates
نویسندگان
چکیده
منابع مشابه
Harmonic peaks of stripe phases in cuprates
We calculate the relative intensities of the main incommensurate and third harmonic peaks expected from elastic neutron scattering for various stripe phases observed in nickelates and some cuprate superconductors. We consider vertical and diagonal stripes and compare both siteand bond-centered configurations of the domain walls. Upon comparing the calculated ratio of the main incommensurate pea...
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Even before the experimental discovery of spinand charge-stripe order in La2−x−yNdySrxCuO4 and La2−xBaxCuO4 at x = 1/8, stripe formation was predicted from theoretical considerations. Nevertheless, a consistent description of the complex coexistence of stripe order with superconductivity has remained a challenge. Here we introduce a Hartree–Fock decoupling scheme that unifies previous approache...
متن کاملOrbital ordering, new phases, and stripe formation in doped layered nickelates.
Ground-state properties of layered nickelates are investigated based on the orbital-degenerate Hubbard model coupled with lattice distortions, by using numerical techniques. The Néel state composed of spin S=1 ions is confirmed in the undoped limit x = 0. At x = 1/2, novel antiferromagnetic states, called CE- and E-type phases, are found by increasing the Hund's coupling. (3x2-r2/3y2-r2)-type o...
متن کاملCharge Stripes and Antiferromagnetism in Insulating Nickelates and Superconducting Cuprates
Neutron and X-ray scattering studies have provided strong evidence for coupled spatial modulations of charge and spin densities in layered nickelates and cuprates. The accumulated results for La2−xSrxNiO4+δ are consistent with the strongly-modulated topological-stripe concept. Clues from Nd-doped La2−xSrxCuO4 suggest similar behavior for the cuprates. The experimental results are summarized, an...
متن کاملStripe ordering in the Cuprates
Upon cooling, many materials undergo an electronic phase transition leading to infinite conductivity. This state of matter, known as superconductivity, was first discovered in 1911 by Kamerlingh Onnes while working with liquefied helium [Onnes]. At 4.2K he discovered that the resistivity of mercury dropped below detectable values. Shortly after this discovery, many other elements, such as tin, ...
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ژورنال
عنوان ژورنال: Physical Review B
سال: 1998
ISSN: 0163-1829,1095-3795
DOI: 10.1103/physrevb.57.1422