Giant Resistive Peak Close to The Superconducting Transition in Bi2Sr2CaCu2O8 Single Crystals

Abstract

A remarkable resistivity anomaly near the superconducting transition temperature is observed in the ab-plane of as-grown Bi 2 Sr 2 CaCu 2 0 8 (Bi-2212) single crystals. The resistivity at the peak is much large than the normal state resistivity areund 100 K. The peak vanished gradually with increasing the applied magnetic field or transport current. The I-V curves of the samples exhibit also a peak close the transition steps, vanishing gradually with increasing magnetic field. The observed phenomena can be interpreted as a quasireentrant behaviour resulting from an intrinsic granularity of high-Tc superconductors.

Phase-slip-like resistivity in underdopedYBa2Cu3O7Abdelhadi1, Jung2 2003Phys. Rev. B9040View full textAdd to dashboardCite

“…The experimental data for ρ(T, B) obtained for the underdoped YBCO film are qualitatively similar to those observed before in HTSC [1,2,3]. The anomalous resistive the opposite happens, where a minimum starts to develop with its width increasing with an increasing applied current.…”

“…According to the resistive model, the broadening required for the peak to be eliminated from ρ(T ) should be material-independent provided that the ratio ∆ρ/ρ B = (ρ P − ρ B )/ρ B (where ρ P is the peak's resistivity and ρ B is the resistivity measured in a magnetic field B at the peak's temperature in the absence of the peak) does not change. The experimental data in Refs [1,2,3,4] show that this is not the case. Table 1 lists the data for ∆ρ/ρ B , ∆T c (B * ), and the magnetic field B * at which the peak disappears, for different superconducting materials.…”

“…Observation of a large resistive peak in the temperature dependence of resistivity ρ(T ) just below the onset T c has been reported in crystals of high T c superconductors (HTSC) like (Nd, P r) 1.85 Ce 0.15 CuO 4−y [1], YBCO(123) [2], and BSCCO(2212) [3]. In all these cases, the magnitude of the resistive peak is higher than the resistivity at the onset T c .…”

“…Crusellas et al [1] and Han et al [3] proposed that the anomaly in ρ ab (T ) of (P r, Nd) 1.85 Ce 0.15 CuO 4−y and BSCCO(2212) crystals is the manifestation of a quasireentrant behavior, which results from the intrinsic granularity. Han et al rejected the explanation based on non-uniformly distributed T c -inhomogeneities (Ref.…”