Abstract
We study the field for the penetration of a first vortex, , for vortex matter nucleated in micron-sized samples with edges aligned along the nodal and antinodal directions of the -wave superconducting order parameter of . Here we present evidence that the for vortex matter nucleated in mesoscopic samples with edges parallel to the nodal direction is larger than for the antinodal case, % 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.
- Received 24 April 2019
- Revised 6 July 2019
DOI:https://doi.org/10.1103/PhysRevB.100.064508
©2019 American Physical Society