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10 papers · 2 filters
Pairing Correlations in a Generalized Hubbard Model for the Cuprates
L. Arrachea, A. Aligia
Using numerical diagonalization of a 4x4 cluster, we calculate on-site s, extended s and d pairing correlation functions (PCF) in an effective generalized Hubbard model for the cup…
Superconductivity in Ferromagnetic RuSr2GdCu2O8
W. E. Pickett, R. Weht, A. B. Shick
Relying on the inhomogeneous (layered) crystal, electronic, and magnetic structure, we show how superconductivity can coexist with the ferromagnetic phase of RuSr2GdCu2O8 as observ…
Four-fold basal plane anisotropy of the nonlocal magnetization of YNi2B2C
L. Civale, A. V. Silhanek, J. R. Thompson +3
Studies of single crystal YNi2B2C have revealed a four-fold anisotropy of the equilibrium magnetization in the square crystallographic basal plane. This pi/2 periodicity occurs dee…
First order phase transition of the vortex lattice in twinned YBa2Cu3O7 single crystals in tilted magnetic fields
B. Maiorov, G. Nieva, E. Osquiguil
We present an exhaustive analysis of transport measurements performed in twinned YBa2Cu3O7 single crystals which stablishes that the vortex solid-liquid transition is first order w…
Triplet superconductivity in quasi one-dimensional systems
A. A. Aligia, Liliana Arrachea
We study a Hubbard hamiltonian, including a quite general nearest-neighbor interaction, parametrized by repulsion V, exchange interactions Jz, Jperp, bond-charge interaction X and…
Role of twin boundaries on the vortex dynamics in YBaCuO
H. Pastoriza, S. Candia, G. Nieva
By means of a novel technique of rotating the applied current we have directly measured the influence of twin boundaries on the vortex motion in a YBaCuO single crystal…