Sie befinden Sich nicht im Netzwerk der Universität Paderborn. Der Zugriff auf elektronische Ressourcen ist gegebenenfalls nur via VPN oder Shibboleth (DFN-AAI) möglich. mehr Informationen...
Thermal fluctuations near a phase transition probed through the electrical resistivity of high-temperature superconductors
Ist Teil von
American journal of physics, 2010-03, Vol.78 (3), p.310-316
Ort / Verlag
Woodbury: American Institute of Physics
Erscheinungsjahr
2010
Link zum Volltext
Quelle
AIP Journals
Beschreibungen/Notizen
We present a simple and inexpensive experimental setup that can determine the thermal fluctuations near a superconducting transition. By using equipment common in undergraduate laboratories, the in-plane dc electrical resistivity of a cuprate superconductor as a function of temperature is measured with resolution sufficient to analyze the fluctuation conductivity above the superconducting critical temperature, including the values of the critical exponents. We also present a simple calculation of the fluctuation conductivity, including its dependence on the layered structure of the material, within the Gaussian–Ginzburg–Landau formalism.