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Electronic Structure of Vortices Pinned by Columnar Defects in \(p_x {\pm }{i}{p_{y}}\) Superconductors

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Abstract

Insulating columnar inclusions in a type II chiral \(p_x \pm i p_y\) superconductor are shown to affect essentially the electronic structure of pinned vortices, and, as a consequence, the scanning tunneling microscopy (STM) patterns and the microwave response in the vortex phase. The structure of the anomalous spectral branch analyzed within the Bogolubov–de Gennes theory is found to depend strongly on the mutual orientation of the angular momenta of the center of mass and the relative motion of two electrons in the Cooper pair. This dependence reveals itself in the nontrivial behavior of the Hall part of the microwave response and difference of the STM patterns for opposite magnetic field orientations.

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Acknowledgments

We thank A. Samokhvalov for stimulating discussions, G. Volovik for valuable comments, and B. Shapiro for correspondence. This work was supported by the Russian Foundation for Basic Research (VLV) and Russian Science Foundation under Grant No. 15-12-10020 (ASM).

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Authors and Affiliations

  1. Institute for Physics of Microstructures, Russian Academy of Sciences, GSP-105, Nizhny Novgorod, Russia, 603950

    V. L. Vadimov & A. S. Mel’nikov

  2. Lobachevsky State University of Nizhny Novgorod, 23 Prospekt Gagarina, Nizhny Novgorod, Russia, 603950

    A. S. Mel’nikov

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  1. V. L. Vadimov
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Correspondence to V. L. Vadimov.

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Vadimov, V.L., Mel’nikov, A.S. Electronic Structure of Vortices Pinned by Columnar Defects in \(p_x {\pm }{i}{p_{y}}\) Superconductors. J Low Temp Phys 183, 342–358 (2016). https://doi.org/10.1007/s10909-016-1519-7

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