Ig. Gorlova et al., SIZE EFFECT IN THE RESISTANCE OF NARROW SUPERCONDUCTING BSCCO(2212) WHISKERS NEAR THE BEREZINSKII-KOSTERLITZ-THOULESS TRANSITION, JETP letters, 68(3), 1998, pp. 216-222
The temperature dependence of the resistance and the current-voltage c
haracteristics are measured for Bi2Sr2CaCu2Ox whiskers of different wi
dth, including whiskers possessing a width step. As the width decrease
s, the resistivity of the whiskers below the Berezinskii-Kosterlitz-Th
ouless transition temperature increases, while above the transition it
decreases. This effect is explained by two-dimensional vortices leavi
ng the sample through its edge and confirms the existence of vortex pa
irs in layered high-T-C superconductors. (C) 1998 American Institute o
f Physics.