Poster Spotlight: Spin Transport Through Superconductor / Weyl Semimetal Heterodevices

When and Where

Nov 29, 2023
5:00pm - 7:00pm

Hynes, Level 1, Hall A

Presenter

Xiaodong Hu, Cambridge University

Co-Author(s)

Xiaodong Hu¹, Jason W. A. Robinson¹, Adrian Ionescu¹, Nadia Stelmashenko¹, Leyla Colakerol Arslan¹, Francesca Chiodi¹, Hisakazu Matsuki¹, Sijie Wang¹, Jiahui Xu¹

1. Department of Materials Science and Metallurgy, Cambridge University, Cambridge, United Kingdom.

Abstract

Xiaodong Hu¹, Jason W. A. Robinson¹, Adrian Ionescu¹, Nadia Stelmashenko¹, Leyla Colakerol Arslan¹, Francesca Chiodi¹, Hisakazu Matsuki¹, Sijie Wang¹, Jiahui Xu¹

1. Department of Materials Science and Metallurgy, Cambridge University, Cambridge, United Kingdom.

Transport of spin information over large distances is key for many applications in spintronics. Achieving spin transmission within superconducting devices should lead to reductions in Joule heating and massive improvements in device efficiency and performance. The Weyl semimetal Mn₃Ge [1, 2, 3, 4] with an antiferromagnetic or ferrimagnetic phase has recently emerged as a promising material for spin transmission studies in the superconducting [1] and normal [3, 4] states. In this poster, we report the fabrication of magnetron-sputtered thin-films of Mn₃Ge and superconducting heterostructures with sub-nanometer-thickness-control in order to investigate the interplay between superconductivity and spin transport in Mn₃Ge. The results build a framework for spin-transport control in the superconducting state.

[1] Jeon, K.-R., et al. (2021). "Long-range supercurrents through a chiral non-collinear antiferromagnet in lateral Josephson junctions." Nature Materials 20(10): 1358-1363.
[2] Kobayashi, A., et al. (2020). "Structural and magnetic properties of Mn3Ge films with Pt and Ru seed layers." AIP Advances 10(1).
[3] Hong, D., et al. (2020). "Large anomalous Nernst and inverse spin-Hall effects in epitaxial thin films of kagome semimetal Mn3Ge." Physical Review Materials 4(9): 094201.
[4] Olayiwola, I. O., et al. (2023). "Room temperature positive exchange bias in CoFeB/D019-Mn3Ge noncollinear antiferromagnetic thin films." Journal of Alloys and Compounds 955: 170279.