Showing papers by "Jean-Marc Triscone published in 1995"
TL;DR: This completely epitaxial thin film approach shows the possibility of making nonvolatile, low-voltage ferroelectric field effect devices for both applications and fundamental studies of field-induced doping in novel compounds like SrCuO2.
Abstract: A ferroelectric field effect in epitaxial thin film SrCuO 2 /Pb(Zr 0.52 Ti 0.48 )O 3 heterostructures was observed. A 3.5 percent change in the resistance of a 40 angstrom SrCuO 2 layer (a parent high-temperature superconducting compound) was measured when the polarization field of the Pb(Zr 0.52 Ti 0.48 )O 3 layer was reversed by the application of a pulse of small voltage ( 2 and Pb(Zr 0.52 Ti 0.48 )O 3 . This completely epitaxial thin film approach shows the possibility of making nonvolatile, low-voltage ferroelectric field effect devices for both applications and fundamental studies of field-induced doping in novel compounds like SrCuO 2 .
95 citations
TL;DR: Observation of a field-induced transition in the vortex solid of DyBa2 Cu3O7/(Y1-xPrx)Ba2Cu3O8 superlattices shows an abrupt change in the direction of travel towards the centre of the molecule.
Abstract: We report on the observation of a change in the field dependence of the critical current density ${J}_{c}$ of ${\mathrm{DyBa}}_{2}{\mathrm{Cu}}_{3}{\mathrm{O}}_{7}/({\mathrm{Y}}_{0.45}{\mathrm{Pr}}_{0.55}){\mathrm{Ba}}_{2}{\mathrm{Cu}}_{3}{\mathrm{O}}_{7}$ superlattices at a characteristic magnetic field ${H}_{s}^{*}$. This change shows up as an abrupt transition when analyzing the current-voltage ( $I\ensuremath{-}V$) characteristics in the framework of the vortex glass and collective flux creep theories. This behavior can be traced back to a sudden reduction in the collective pinning energy ${U}_{c}$ above ${H}_{s}^{*}$, and may reflect a softening transition of the vortex lines in the vortex solid. ${H}_{s}^{*}$ is very similar to the characteristic field ${H}_{l}^{*}$ in the vortex liquid phase, which we interpreted to be due to entanglement.
16 citations
TL;DR: In this paper, the authors investigated thermally activated flux-flow resistance of a-axis YBa₂Cu₃O₇/a,b-axis PrBa³Cu³O³µOµµ₉ superlattices in magnetic fields and found that they have a logarithmic magnetic-field dependence.
Abstract: We have investigated resistive properties of a-axis YBa₂Cu₃O₇/a,b-axis PrBa₂Cu₃O₇ superlattices in magnetic fields to study thermally activated flux-flow resistance. We find that in magnetic fields perpendicular to the YBa₂Cu₃O₇/PrBa₂Cu₃O₇ layering the activation energies of these superlattices deduced from the tail of the resistive transitions have a logarithmic magnetic-field dependence for small YBa₂Cu₃O₇ thicknesses (<300 A), in agreement with recent theories of thermally activated resistance in strongly pinned two-dimensional superconductors.
7 citations