Tunnel and thermal c-axis transport in BSCCO in the normal and pseudogap state

Details Tunnel and thermal c-axis transport in BSCCO in the normal and pseudogap state Tunnel and thermal c-axis transport in BSCCO in the normal and pseudogap state

2006-10-19

arxiv.org/abs/cond-mat/0610548v1

Physics

Condensed Matter

Superconductivity

12 pages, 6 figures. Submitted to Superconductor Science and Technology

Scientific paper

10.1088/0953-2048/20/2/S12

We consider the problem of c-axis transport in double-layered cuprates, in particular with reference to Bi$_{2}$Sr$_{2}$CaCu$_{2}$O$_{8+\delta}$ compounds. We exploit the effect of the two barriers on the thermal and tunnel transport. The resulting model is able to describe accurately the normal state c-axis resistivity in Bi$_{2}$Sr$_{2}$CaCu$_{2}$O$_{8+\delta}$, from the underdoped side up to the strongly overdoped. We extend the model, without introducing additional parameters, in order to allow for the decrease of the barrier when an external voltage bias is applied. The extended model is found to describe properly the c-axis resistivity for small voltage bias above the pseudogap temperature $T^{*}$, the c-axis resistivity for large voltage bias even below $T_c$, and the differential $dI/dV$ curves taken in mesa structures.

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