Spin-polarized quasiparticle injection effects in YBCO thin films
arXiv:cond-mat/0505152 · doi:10.1016/j.ssc.2005.04.050
Abstract
We report detailed transport studies on ferromagnet-superconductor heterostructures. Epitaxial heterostructures of half-metal colossal magnetoresistive La2/3Ca1/3MnO3 (HM-CMR) and high Tc superconducting YBa2Cu3O7 (YBCO) are grown on SrTiO3 (100) single crystal substrates by pulsed laser deposition. Using the HM--CMR layer as source for spin-polarized quasiparticles, we show the effect of injection of spin-polarized quasiparticles into the ab-plane and along the c-axis of YBCO. The results show a drop in the ab-plane resistance Rab (T) in the case of injection along the c-axis that is discussed to be related to the opening of a pseudogap.
6 pages, 2 figures
References in corpus (25)
- Spin-Gap Proximity Effect Mechanism of High Temperature Superconductivity
- Transport Properties, Thermodynamic Properties, and Electronic Structure of SrRuO3
- The onset of the vortex-like Nernst signal above Tc in La_{2-x}Sr_xCuO_4 and Bi_2Sr_{2-y}La_yCuO_6
- Optical Conductivity of Manganites: Crossover from Jahn-Teller Small Polaron to Coherent Transport in the Ferromagnetic State
- Weak Pseudogap Behavior in the Underdoped Cuprate Superconductors
- Ferromagnetic/superconducting proximity effect in La0.7Ca0.3MnO3 / YBa2Cu3O7 superlattices
- Microscopic theory of weak pseudogap behavior in the underdoped cuprate superconductors I: General theory and quasiparticle properties
- Proximity induced metal/insulator transition in superlattices
- Magnetic field independence of the spin gap in YBa_2Cu_3O_{7-delta}
- Ferromagnetic/superconducting bilayer structure: A model system for spin diffusion length estimation
- Photoinduced Changes of Reflectivity in Single Crystals of YBa2Cu3O6.5 (Ortho II)
- Phase fluctuations and the pseudogap in YBa2Cu3Ox
- Superconducting Fluctuations and the Pseudogap in the Slightly-overdoped High-Tc Superconductor TlSr2CaCu2O6.8: High Magnetic Field NMR Studies
- Pressure Studies on a High- Superconductor Pseudogap and Critical Temperatures
- The anomaly of the oxygen bond-bending mode at 320 cm and the additional absorption peak in the c-axis infrared conductivity of underdoped YBaCuO single crystals revisited by ellipsometricmeasurements
- A Theory for High- Superconductors Considering Inhomogeneous Charge Distribution
- Magnetic Field Effect on the Pseudogap Temperature within Precursor Superconductivity
- Antiferromagnetism at the YBa2Cu3O7 / La2/3Ca1/3MnO3 interface
- Phase diagram of underdoped cuprate superconductors: effect of Cooper-pair phase fluctuations
- Enhancement of flux-line pinning in all-oxide superconductor/ferromagnet heterostructures
- Two Pseudogaps in the Cuprates
- Gorkov equations for a pseudo-gapped high temperature superconductor
- Probing spin-charge separation using spin transport
- Suppression of Superconductivity in YBCO/LCMO Superlattices
- Andreev interferometry as a probe of superconducting phase correlations in the pseudogap regime of the cuprates