ISSN:
1572-9605
Schlagwort(e):
High-T c superconductors
;
dielectric response
;
electronic transport
Quelle:
Springer Online Journal Archives 1860-2000
Thema:
Elektrotechnik, Elektronik, Nachrichtentechnik
,
Physik
Notizen:
Abstract The dc conductivity and the high-frequency capacitance of a La2CuO4+δ single crystal are determined by impedance spectroscopy in the frequency range 20 Hz to 1 MHz at liquid helium temperature. Using isochronal annealing, the effect of the phase separation on these quantitites is studied for E parallel and perpendicular to the CuO2 planes as well as for different oxygen doping levels,δ, of the sample. The results are consistent with the model of a diffusion-controlled formation of a metallic—and belowT c superconducting—percolation network in an insulating background.
Materialart:
Digitale Medien
URL:
http://dx.doi.org/10.1007/BF00727279
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