Coulomb Gap and Correlated Vortex Pinning in Superconductors
Uwe C. Täuber, Hongjie Dai, David R. Nelson, Charles M. Lieber
DOI 10.1103/PhysRevLett.74.5132 · Physical Review Letters
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Abstract
The positions of columnar pins and magnetic flux lines determined from a decoration experiment on Bi2Sr2CaCu2O8 were used to calculate the distribution of pinning energies in the Bose glass phase. A wide Coulomb gap is found, with effective gap exponent seff≈1.2, as a result of interactions between the vortices. As a consequence, the variable-range hopping transport of flux lines is considerably reduced with respect to the noninteracting case, the effective Mott exponent being enhanced from p0=1/3 to peff≈0.5 for this sample.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| Bi2Sr2CaCu2O8 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 87 | Pressure not reported | unknown |
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