Excess conductivity of Cu0.5Tl0.5Ba2Ca1Cu2O8-δ thin films induced by thermal fluctuation: importance of 3D fluctuations
Creators
- 1. Materials Science Laboratory, Department of Physics, Quaid-i-Azam University, Islamabad 45320 (Pakistan)
Description
The superconductivity in Cu0.5Tl0.5Ba2Ca1Cu2O8-δ (Cu0.5Tl0.5-1212) thin films is studied in the light of the Aslamazov-Larkin (AL) theory of fluctuation-induced conductivity (FIC). Analysis of FIC has shown that removal/addition of oxygen in the charge reservoir layer after post-annealing of Cu0.5Tl0.5-1212 thin films changes the dimensionality of the fluctuations which induce conductivity of mobile carriers. The samples post-annealed in nitrogen have shown higher Tc(0) with 3D behavior of FIC over a wide temperature range, whereas the samples post-annealed in oxygen have smaller Tc(0) and possess only 2D fluctuations. These results suggest that the value of Tc(0) also depends on the dimensionality of thermal fluctuations which induce excess conductivity
Additional details
Identifiers
- DOI
- 10.1088/0953-8984/20/04/045216;
- PII
- S0953-8984(08)56612-4;
Publishing Information
- Journal Title
- Journal of Physics. Condensed Matter
- Journal Volume
- 20
- Journal Issue
- 4
- Journal Page Range
- p. 045216
- ISSN
- 0953-8984
- CODEN
- JCOMEL
INIS
- Country of Publication
- United Kingdom
- Country of Input or Organization
- International Atomic Energy Agency (IAEA)
- INIS RN
- 39063723
- Subject category
- S75: CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY;
- Descriptors DEI
- ANNEALING; BARIUM COMPOUNDS; CALCIUM COMPOUNDS; COPPER COMPOUNDS; FLUCTUATIONS; LAYERS; NITROGEN; OXYGEN; SUPERCONDUCTIVITY; TEMPERATURE RANGE; THALLIUM COMPOUNDS; THIN FILMS; THREE-DIMENSIONAL CALCULATIONS
- Descriptors DEC
- ALKALINE EARTH METAL COMPOUNDS; ELECTRIC CONDUCTIVITY; ELECTRICAL PROPERTIES; ELEMENTS; FILMS; HEAT TREATMENTS; NONMETALS; PHYSICAL PROPERTIES; TRANSITION ELEMENT COMPOUNDS; VARIATIONS