title: Electrical and thermal transport properties of the electron-doped cuprate Sm2-xCexCuO4-ysystem.
abstract: Electrical and thermal transport measurements were performed on thin films of the electron-doped superconductor Sm2-xCexCuO4-y(x  =  0.13  -  0.19) in order to study the evolving nature of the charge carriers from the under-doped to over-doped regime. A temperature versus cerium content (T  -  x) phase diagram has been constructed from the electrical transport measurements, yielding a superconducting region similar to that found for other electron-doped superconductors. Thermopower measurements show a dramatic change from the underdoped region (x  <  0.15) to the overdoped region (x  >  0.15). Application of the Fisher-Fisher-Huse (FFH) vortex glass scaling model to the magnetoresistance data was found to be insufficient to describe the data in the region of the vortex-solid to vortex-liquid transition. It was found instead that the modified vortex glass scaling model of Rydh, Rapp, and Anderson provided a good description of the data, indicating the importance of the applied field on the pinning landscape. A magnetic field versus temperature (H  -  T) phase diagram has also been constructed for the films with [Formula: see text], displaying the evolution of the vortex glass melting lines Hg(T) across the superconducting regime.
authors.forename: D J
authors.initials: DJ
authors.lastname: Scanderbeg
authors.forename: B J
authors.initials: BJ
authors.lastname: Taylor
authors.forename: R E
authors.initials: RE
authors.lastname: Baumbach
authors.forename: J
authors.initials: J
authors.lastname: Paglione
authors.forename: M B
authors.initials: MB
authors.lastname: Maple