Normal-statec-axis transport inBi2Sr2CaCu2

Universal scaling behavior of thec-axis resistivity of high-temperature superconductors

“…To test our single-parameter scaling conjecture, we have analyzed the experimental data of c published for Bi 2 Sr 2 CaCu 2 O 8+␦ ͑Bi2212͒ by Watanabe et al, 19,20 Chen et al, 21 and Guira et al, 22 for Bi 2 Sr 2 Ca 2 Cu 3 O 10+␦ ͑Bi2223͒ by Fujii et al, 23 and for YBa 2 Cu 3 O 7−␦ ͑Y123͒ by Yan et al 24 and by Babic et al 25 We find that all these experimental data of c can be well fitted by Eq. ͑8͒ nearly in the entire temperature range.…”

Nonlinearc-axis transport inBi2Sr2CaCu2OGiura1, Pompeo2, Silva3 2009Phys. Rev. BSelf Cite1000View full textAdd to dashboardCite

“…31 The resulting parameters exhibited very regular doping dependences such as a linearly decreasing ⌬ 2 ͑␦͒. 12 By comparing the data taken in the mesa with the full body of the preexisting elaborations we identified the parameters to be used. The dI / dV curves were then calculated directly, without further adjustments.…”

“…We build up a model for the c-axis dI / dV based on the presence of two different energy barriers, where each one gives rise to tunnel and thermally activated currents. [12][13][14] We show that this simple model, based solely on the existence of two energy barriers and without any particular features in the DOS, can reproduce many aspects of the experimental dI / dV. In particular, the parabolic behavior is reproduced quantitatively.…”

“…In particular, the model was able to reproduce the local minimum of c ͑T͒ which appears at optimal doping and slight underdoping. 12 The details, including the crossover from thermal to tunnel transport by varying the temperature and the height of the barriers, have been worked out and discussed previously. 12,14 In the following we focus on the extension of this model to nonlinear transport.…”

“…17 In particular, in-plane inelastic phononic scattering given by the scattering time reduces the tunneling matrix element t c to ͑2 / ប͒t c 2 Ӷ t c . In the linear response ͑vanishing voltage͒, the resistivity in the two-barrier model is then given by the simple expression 12,14 c,n = 1…”