Dynamics of Transient Disordered Vortex States in Bi 2 Sr 2 Cacu 2 O 8+δ Typeset Using Revt E X 1
نویسندگان
چکیده
The dynamics of transient disordered vortex states in Bi 2 Sr 2 CaCu 2 O 8+δ was magneto-optically traced in three experiments: (i) during continuous injection of transient vortex states while ramping up the external magnetic field, (ii) during annealing of injected transient states while keeping the external field constant, and (iii) during annealing of transient 'supercooled' disordered states while ramping down the external field. The results reveal front-like propagation (experiment i) or retreat (experiments ii and iii) of the transient vortex states, at a rate governed by the rate of change of the external field, the annealing time τ of the transient states and the creep rate. The experimental results are theoretically analyzed in terms of competition between generation and annealing of transient disordered vortex states. Extraction of the anneal-ing time τ from the above three experiments, yields the same results for τ as a function of the induction, B, and temperature T. Knowledge of τ (B, T) allows for correct determination of the thermodynamic order-disorder vortex phase transition line.
منابع مشابه
Vortex - induced quasi - particle checkerboard in Bi 2 Sr 2 CaCu 2 O 8 þ
Scanning tunneling microscopy is used to image the additional quasi-particle states generated by quantized vortices in the high-Tc superconductor Bi2Sr2CaCu2O8þd. They exhibit a Cu–O bond oriented checkerboard pattern, with ð4:2 0:4Þa0 periodicity and 30 A decay length. 2003 Elsevier Science B.V. All rights reserved.
متن کاملPseudogap in Bi 2 Sr 2 CaCu 2 O 8 + δ studied by measuring anisotropic susceptibilities and out - of - plane transport
We find in the Bi2Sr2CaCu2O8+δ system that the characteristic temperatures T ∗ χ (below which the uniform susceptibilities χab(T ) (H⊥c) and χc(T ) (H‖c) decrease) and T ∗ ρc (below which the out-of-plane resistivity ρc(T ) shows typical upturn) coincide for all doping levels. We attribute the T dependence of χ’s and ρc to the anomalous (pseudogapped) density-of-states (DOS) in high-Tc cuprates...
متن کاملDispersion of the Strongly Correlated Electron System near the Fermi Level Typeset Using Revt E X
The reason for the appearance of two distinct bands in the photoemission of the single CuO 2 plane Bi 2 Sr 2−x La x CuO 6+δ near the Fermi level is discussed on the basis of the self-consistent solution of the two-dimensional t-J model.
متن کاملnd - m at . s up r - co n ] 1 4 N ov 1 99 9 Gap anisotropy in the angle - resolved photoemission spectroscopy of Bi 2 Sr 2 CaCu 2 O 8 + δ
The gap anisotropy in Bi 2 Sr 2 CaCu 2 O 8+δ is revisited in the framework of a d-wave scenario in view of the recent angle-resolved photoemission experiment. Based on a tight-binding fit to the normal state dispersion, a detail analysis on the effects of the inclusion of the next harmonic in the d-wave has been presented. Significant effect has been observed in the superconducting T c. The den...
متن کامل