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Doppler-scanning tunneling microscopy current imaging in superconductor-ferromagnet hybrids
Journal article   Open access   Peer reviewed

Doppler-scanning tunneling microscopy current imaging in superconductor-ferromagnet hybrids

S. A. Moore, G. Plummer, J. Fedor, J. E. Pearson, V. Novosad, G. Karapetrov, M. Iavarone and Temple Univ., Philadelphia, PA (United States)
Applied physics letters, v 108(4), p42601
25 Jan 2016
DOI: https://doi.org/10.1063/1.4940190
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https://doi.org/10.1063/1.4940190View
Published, Version of Record (VoR)CC BY V4.0,  Open

Abstract

Physical Sciences Physics Physics, Applied Science & Technology
Mapping the distribution of currents inside a superconductor is usually performed indirectly through imaging of the stray magnetic fields above the surface. Here, we show that by direct imaging of the Doppler shift contribution to the quasiparticle excitation spectrum in the superconductor using low temperature scanning tunneling microscopy, we obtain directly the distribution of supercurrents inside the superconductor. We demonstrate the technique at the example of superconductor/ferromagnet hybrid structure that produces intricate current pattern consisting of combination Meissner shielding currents and Abrikosov vortex currents. (C) 2016 AIP Publishing LLC.

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Physics, Applied
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