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Dolz, M.I.; Bolecek, N.R.C.; Puig, J.; Pastoriza, H.; Nieva, G.; Guimpel, J.; van der Beek, C.J.; Konczykowski, M.; Fasano, Y. |
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Enhancement of penetration field in vortex matter in mesoscopic superconductors due to Andreev bound states |
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2019 |
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Physical Review B |
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PRB |
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100 |
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6 |
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064508 |
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Abstract |
We study the field for the penetration of a first vortex, HP, for vortex matter nucleated in micron-sized samples with edges aligned along the nodal and antinodal directions of the d-wave superconducting order parameter of Bi2Sr2CaCu2O8−δ. Here we present evidence that the HP for vortex matter nucleated in mesoscopic samples with edges parallel to the nodal direction is larger than for the antinodal case, ∼72% at low temperatures. This finding supports the theoretical proposal that surface Andreev bound states appearing in a sample with edges parallel to the nodal direction would produce an anomalous Meissner current that increases the Bean-Livingston barrier for vortex penetration. |
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American Physical Society |
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Call Number |
BT @ pedrazp @ 10.1103/PhysRevB.100.064508 |
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822 |
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