SKM 2023 – wissenschaftliches Programm

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TT: Fachverband Tiefe Temperaturen

TT 11: Spintronics, Spincalorics and Magnetotransport

TT 11.1: Vortrag

Montag, 27. März 2023, 15:00–15:15, HSZ 304

Van der Waals/non-van der Waals hybrids for superconducting spintronics — Roman Hartmann, Alfredo Spuri, Danilo Nikolic, Wolfgang Belzig, Elke Scheer, and •Angelo Di Bernardo — Universität Konstanz, Konstanz, Germany

The realization of Cooper pairs of electrons with parallel-aligned spins (i.e., spin-triplet pairs) has been demonstrated for a variety of three-dimensional (3D) superconductor/ferromagnet (S/F) heterostructures. Several studies have shown that using S/F system with a magnetically inhomogeneous F [1-2] it is possible to convertthe spin-singlet pairs of a conventional S into fully-polarized spin triplets - this has paved the way for superconducting spintronics. Van-der-Waals (vdW) heterostructures host a variety of unconventional phases, both superconducting and magnetic, which can be explored to realize two-dimensional (2D) superspintronic devices with novel functionalities and types of control compared to devices based on 3D S/F hybrids. The conversion of spin singlets into spin triplets across a 2D S/F vdW interface represents, however, the first step towards superconducting spintronics based on vdW hybrids. In this talk, I will show recent magnetotransport experiments obtained on F nanoflakes that are cleaved from 3D ionic F single crystals through a new approach. The unique properties of these nanoflakes are used for the fabrication of novel superspintronics devices, where the nanoflakes are coupled to conventional 2D vdW S materials.
[1] J. W. A. Robinson et al., Science 329, 59 (2010)
[2] A. Di Bernardo et al., Nat. Commun. 6, 8053 (2015)