Efficient spin transport and quantum phase change in a graphene/topological insulator heterostructure

Gregory M. Stephen; Jennifer E. DeMell; Ivan I. Naumov; Nicholas A. Blumenschein; Y. J. Leo Sun; Sharmila N. Shirodkar; Pratibha Dev; Patrick J. Taylor; Jeremy T. Robinson; Paul M. Campbell; Aubrey T. Hanbicki; Adam L. Friedman

doi:10.1117/12.2675944

28 September 2023 Efficient spin transport and quantum phase change in a graphene/topological insulator heterostructure

Gregory M. Stephen, Jennifer E. DeMell, Ivan I. Naumov, Nicholas A. Blumenschein, Y. J. Leo Sun, Sharmila N. Shirodkar, Pratibha Dev, Patrick J. Taylor, Jeremy T. Robinson, Paul M. Campbell, Aubrey T. Hanbicki, Adam L. Friedman

Author Affiliations +

Proceedings Volume PC12656, Spintronics XVI; PC126560G (2023) https://doi.org/10.1117/12.2675944
Event: SPIE Nanoscience + Engineering, 2023, San Diego, California, United States

Abstract

Individually, both graphene and PbxSn1-xTe (PST) are widely investigated for spintronic applications due to graphene’s high carrier mobility and PST’s topologically protected surface states. Here, we combine monolayer graphene with PST and demonstrate a hybrid system with enhanced properties relative to the constituent materials. Through a combination of standard magnetotransport and non-local spin measurements, we demonstrate the system contains two distinct spin transport channels: a low temperature channel with significant Rashba spin-orbit coupling and a high-temperature conventional conducting channel with efficient spin transport up to at least 500 K.

Conference Presentation

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Gregory M. Stephen, Jennifer E. DeMell, Ivan I. Naumov, Nicholas A. Blumenschein, Y. J. Leo Sun, Sharmila N. Shirodkar, Pratibha Dev, Patrick J. Taylor, Jeremy T. Robinson, Paul M. Campbell, Aubrey T. Hanbicki, and Adam L. Friedman "Efficient spin transport and quantum phase change in a graphene/topological insulator heterostructure", Proc. SPIE PC12656, Spintronics XVI, PC126560G (28 September 2023); https://doi.org/10.1117/12.2675944

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