Conductivity of Doped Two-Leg Ladders

Details Conductivity of Doped Two-Leg Ladders Conductivity of Doped Two-Leg Ladders

2000-07-28

arxiv.org/abs/cond-mat/0007484v1

Physics

Condensed Matter

Strongly Correlated Electrons

5 pages, 3 postscript figures

Scientific paper

10.1103/PhysRevLett.86.1315

Recently, conductivity measurements were performed on the hole-doped two-leg ladder material Sr_{14-x}Ca_xCu_{24}O_{41}. In this work, we calculate the conductivity for doped two-leg ladders using a model of hole-pairs forming a strongly correlated liquid - a single component Luttinger liquid - in the presence of disorder. Quantum interference effects are handled using renormalization group methods. We find that our model can account for the low energy features of the experimental results. However, at higher energies the experiments show deviations from the predictions of this model. Using the results of our calculations as well as results on the ground state of doped two-leg ladders, we suggest a scenario to account for the higher energy features of the experimental results.

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