Magnetic proximity in Semiconductor- Superconductor -Ferromagnetic epitaxial tri-crystals
Topological materials hold promise in quantum information processing as a fault tolerant basis for qubit operations. An important class of topological states are the so-called Majorana bound states (MBS), which are predicted to exist at the ends of one-dimensional p-wave superconductors. To reach the topological phase, an external magnetic field is used to lift the spin degeneracy which is not compatible with scalable quantum-computing platforms. Therefore, it is of interest to integrate materials that are intrinsically topological, and therefore study composite tri-crystals composed of ferromagnetic insulators (FMI) in close proximity to semiconductor-superconductor hybrids. We will investigate the magnetic proximity between the magnetic EuS layer and the semiconductor and superconductor components. In particular, we propose to perform PNR measurements on 1) Al/EuS/InAs (20 nm/ 10 nm / 50 nm) and 2) Pb/EuS/InAs (20 nm/ 10 nm / 50 nm). We already did a pilot experiment at AMOR (PSI) with excellent results that are about to be published.
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KROGSTRUP Peter; BIRKEMOSE Soren; KINANE CHRISTIAN; LEFMANN Kim; LIU Yu; LUCHINI Alessandra; SAERBECK Thomas and SANLORENZO Irene. (2020). Magnetic proximity in Semiconductor- Superconductor -Ferromagnetic epitaxial tri-crystals. Institut Laue-Langevin (ILL) doi:10.5291/ILL-DATA.5-54-298
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