Differential conductance of the ferromagnet/superconductor interface of DyBa2Cu3O7/La2/3Ba1/3MnO3 heterostructures

Abstract

Magnetic memory based on La 0.7 Ca 0.3 MnO 3 / YBa 2 Cu 3 O 7 / La 0.7 Ca 0.3 MnO 3 ferromagnet/superconductor hybrid structures Appl. Phys. Lett. 97, 032501 (2010); 10.1063/1.3464960 Spin wave scattering and interface magnetism in superconducting-ferromagnet-superconducting hybrid structures

Proximity effect, quasiparticle transport, and local magnetic moment in ferromagnet–d-wave-superconductor junctions

“…where 8) with δ = ±x a , ±x b the unit vectors along the crystalline x a and x b axis. The energy gaps for on-site and nearestneighbor pairing are determined self-consistently 10) where the Boltzmann constant k B = 1 has been taken, and F 0 (i) and F δ (i) are the on-site and nearest-neighbor bond order parameter.…”

“…In an earlier theoretical work, 5 this effect was studied in the zero-bias limit. Several recent spin injection experiments [6][7][8][9] have been done with high-T c superconductors. Common to both ferromagnetconventional and high-T c superconductor junctions, the subgap conductance at a given bias is suppressed due to the suppression of AR by the spin splitting of energy band in the ferromagnet.…”

“…In particular, a zero-bias conductance dip was observed in the ferromagnet-high-T c superconductor contacts. 8 It has been widely accepted that the high-T c superconductors have a d-wave pairing symmetry. 10 The above interesting observation may indicate the importance to take into account the unconventional pairing symmetry of the cuprate superconductors.…”

Spin-polarized transport across aLa0.7Sr0.3MnO3Chen1, Biswas2, Žutić3 et al. 2001Phys. Rev. B680280View full textAdd to dashboardCite

“…There is generally a good understanding of transport in normal metal/high temperature superconductor (HTSC) junctions and the important role of the Andreev bound states (midgap states) [4][5][6][7][8], which lead to the formation of the zero bias conductance peak (ZBCP). In contrast, there remain many open questions in the spin-polarized case involving heterostructures of colossal magnetoresistance materials (CMR) and HTSC [9][10][11][12]. Systematic studies of these systems with high spin polarization are particularly important as they hold potential for probing ferromagnetic interfaces, unconventional superconductivity [11,12] and for modifying superconducting properties, such as the critical current and T c [9].…”

“…In contrast to previous studies [10,13], YBCO is used as the bottom electrode. This choice of geometry (Fig.…”