Interlayer Josephson Coupling of Thermally Excited Vortices inBi2Sr2Ca

Yue-Min Wan¹,

S. E. Hebboul²,

D. C. Harris³

et al.

Abstract

lt has come to our attention that we included the wrong data in Fig. 3(a) for the c-axis resistivity p, (T) A. s in. dicated in the caption of Fig. 3(a), the low-temperature c-axis resistivity can be extracted from the c-axis current-voltage curves V, (I) shown in Fig. 2(a) for the same sample. The figure given below shows the correct c-axis data p, .~d V, /d1, wh. ich is deduced from the low-current (I~10 p, A) linear V, (I) curves of Fig. 2(a). We note that, since the c-axis transition temperature T, and the c-axis critical current density J, were obtained from the c-axis current-voltage characteristics of Fig. 2(a), their estimates are not changed. Note that p, (T) does not vanish at T, , but rather displays a gradually diminishing value below T, which is characteristic of a thermally excited Josephson junction. The main conclusions of the paper are not affected by this correction. 40 30-10-0 0 0 0 -10 0 O 10 83 I~. I 85 86 87 Y(K) 10 88 pl@. 3(a) Fxpanded temperature dependence for sample 1 showing p, and J, deduced form the c-axis current-voltage characteristics of Fig. 2(a).

Critical behavior of layered superconducting films in a parallel magnetic field

“…for the perturbed energy eigenvalues. Substitution of the unperturbed energies above then yields the previous result (10). We thereby recover the formula (11) for the parallel magnetization in the case that l 1 ≥ 2.…”

Nonequilibrium Vortex Melting inBi2Sr2CaCu2O<

“…The second stage is a decoupling transition, which occurs at a higher temperature when thermal excitations cause the vortex lines to disintegrate, destroying long range correlation parallel to the c axis. Although several experiments provide evidence for decoupling of vortex lines [10,[17][18][19][20], it is not clear whether this decoupling is part of a single melting transition [17,10] or a two-stage process [18,20].…”

“…In this highly anisotropic medium, for Hkĉ, V s is a measure of vortex correlations alongĉ [19,24,25], while V ab is a measure of the resistivity parallel to the a-b plane [8]. Figure 1 shows V ab as a function of T in applied magnetic fields H # 3 kOe.…”

Observation of excess resistance anomaly at resistive transitions in Ag/Au nanostructures

“…Our earlier experiments [24,25] indicated that T C in the Ag/Au nanostructures also change with ageing, which may complicate unambiguous determination of the effect of the sweep rate alone. A small 'dip' in R immediately following the peak, observed most clearly for cycles h3−h5, has also been observed at the superconductor to normal transitions in Au 0.7 In 0.3 rings [21] and high-T C Bi 2 Sr 2 CaCu 2 O 8−y films [10] that associates the resistance anomaly to the fluctuation regime [7]. In the eight subsequent thermal cycles (at sweep rate 0.5 K/min), the biasing current was varied from 10 µA to 7 mA (Fig.…”