Junyi Zhao1,Kieran Bozier1,Anna Chesca1,Hisakazu Matsuki1,Adrian Ionescu1,Leyla Arslan2,Nadia Stelmashenko1,Francesca Chiodi3,Jason Robinson1
University of Cambridge1,Gebze Technical University2,Université Paris-Saclay3
Junyi Zhao1,Kieran Bozier1,Anna Chesca1,Hisakazu Matsuki1,Adrian Ionescu1,Leyla Arslan2,Nadia Stelmashenko1,Francesca Chiodi3,Jason Robinson1
University of Cambridge1,Gebze Technical University2,Université Paris-Saclay3
The proximity effect at a superconductor interface with a ferromagnet layer (S/F) can lead to unconventional electron pairing [1-3] and nonreciprocal edge transport (i.e., a superconducting diode effect (SDE)) [4,5]. The underlying mechanism of the SDE can have mixed origins related to spin-orbit coupling (SOC) or vortex flow with a geometrically asymmetric pinning potential in S and at S/F interfaces in mesoscopic wires [6-8]. Here we report an experimental investigation of the SDE and edge transport in superconducting (Nb, V and RhS) wires interfacial magnetism and/or Rashba SOC versus layer thickness, wire width, temperature and microstructure. The F layer in conjunction with interfacial SOC should affect the pinning potential along the edge regions of an S/F wire and modulate vortex dynamics, driving a nonreciprocal supercurrent [9,10]. Our experiments form a framework for understanding and optimizing the SDE in superconducting wires with the aim of achieving full magnetic control of charge and potentially spin for superconducting quantum devices.<br/><br/>[1] J. Linder and J. W. A. Robinson, Nature Physics 11, 307 (2015).<br/>[2] S. Komori et al., Science Advances 7, eabe0128 (2021).<br/>[3] L. A. B. Olde Olthof, L. G. Johnsen, J. W. A. Robinson, and J. Linder, Physical Review Letters 127, 267001 (2021).<br/>[4] S. Ilić and F. S. Bergeret, Physical Review Letters 128, 177001 (2022).<br/>[5] K.-R. Jeon, J.-K. Kim, J. Yoon, J.-C. Jeon, H. Han, A. Cottet, T. Kontos, and S. S. P. Parkin, Nature Materials 21, 1211 (2022).<br/>[6] Y. Hou et al., 2022), p. arXiv:2205.09276.<br/>[7] N. Satchell, P. Shepley, M. Rosamond, and G. Burnell, Journal of Applied Physics 133 (2023).<br/>[8] A. Gutfreund et al., Nature Communications 14, 1630 (2023).<br/>[9] M. K. Hope, M. Amundsen, D. Suri, J. S. Moodera, and A. Kamra, Physical Review B 104, 184512 (2021).<br/>[10] L. A. B. Olde Olthof, X. Montiel, J. W. A. Robinson, and A. I. Buzdin, Physical Review B 100, 220505 (2019).