Browsing by Author "Lieber, C."

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    Coulomb Gap and Correlated Vortex Pinning in Superconductors
    Täuber, Uwe C.; Dai, H.; Nelson, D.; Lieber, C. (1995-06-19)
    The positions of columnar pins and magnetic flux lines determined from a decoration experiment on BSCCO were used to calculate the single–particle density of states at low temperatures in the Bose glass phase. A wide Coulomb gap is found, with gap exponent s ≈ 1 .2, as a result of the long–range interaction between the vortices. As a consequence, the variable–range hopping transport of flux lines is considerably reduced with respect to the non– interacting case, the effective Mott exponent being enhanced from p0 = 1/3 to peff ≈ 0 .5 for this specific experiment.