Please use this identifier to cite or link to this item: https://scholarbank.nus.edu.sg/handle/10635/235766
Title: ​INTERPLAY BETWEEN SUPERCONDUCTIVITY AND FERROMAGNETISM IN A VAN DER WAALS SUPERCONDUCTOR
Authors: QU, TINGYU
ORCID iD:   orcid.org/0000-0002-4409-3072
Keywords: Superconducting Spintronics, Van der Waals Engineering, 2D Materials, Ferromagnetic Superconductors, Triplet Cooper Pairs, Topological Computers
Issue Date: 5-Aug-2022
Citation: QU, TINGYU (2022-08-05). ​INTERPLAY BETWEEN SUPERCONDUCTIVITY AND FERROMAGNETISM IN A VAN DER WAALS SUPERCONDUCTOR. ScholarBank@NUS Repository.
Abstract: Ferromagnetic superconductors offer tantalizing possibilities for topological qubits. Yet, triplet pairing rarely exists in solid-state systems due to the competition between superconductivity and magnetism. Despite the prospects with the heavy-fermion compounds and engineered heterostructures, a complete synergy between the superconducting and ferromagnetic orders remains to be seen at device level. Here, we realize a direct implantation of dilute ferromagnetism into a van der Waals superconducting spin valve. In the superconducting regime, we observe a tunable Kondo effect, which re-enters into a superconducting phase under high magnetic field, and a switch of the tunneling magnetoresistance inside the superconducting energy gap. These findings suggest ferromagnetism is induced in our superconducting system, where spin-triplet pairing likely occurs below the Curie temperature. We further demonstrate a tunable long-range diffusion of the spin-polarized supercurrents via a non-local geometry and highlight its promise for superconducting spintronics.
URI: https://scholarbank.nus.edu.sg/handle/10635/235766
Appears in Collections:Ph.D Theses (Open)

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