Strong spin-orbit interaction induced by transition metal oxides at the surface of hydrogen-terminated diamond

Xing K, Creedon DL, Yianni SA, Akhgar G, Zhang L, Ley L, McCallum JC, Qi DC, Pakes CI (2020)

Publication Type: Journal article

Publication year: 2020

Journal

Carbon Elsevier

Book Volume: 164

Pages Range: 244-250

DOI: 10.1016/j.carbon.2020.03.047

Abstract

Hydrogen-terminated diamond possesses an intriguing p-type surface conductivity which is induced via thermodynamically driven electron transfer from the diamond surface into surface acceptors such as atmospheric adsorbates, a process called surface transfer doping. High electron affinity transition metal oxides (TMOs) including MoO3 and V2O5 have been shown to be highly effective solid-state surface acceptors for diamond, giving rise to a sub-surface two-dimensional (2D) hole layer with metallic conduction. In this work, low temperature magnetotransport is used as a tool to show the presence of a Rashba-type spin-orbit interaction with a high spin-orbit coupling of 19.9 meV for MoO3 doping and 22.9 meV for V2O5 doping, respectively, through the observation of a transition in the phase-coherent backscattering transport from weak localization to weak antilocalization at low temperature. Surface transfer doping of diamond with TMOs provides a 2D hole system with spin-orbit coupling that is over two times larger than that reported for diamond surfaces with atmospheric acceptors, opening up possibilities to study and engineer spin transport in a carbon material system.

Authors with CRIS profile

Lothar Ley Naturwissenschaftliche Fakultät

Involved external institutions

La Trobe University AU Australia (AU) The University of Melbourne AU Australia (AU) National University of Singapore (NUS) SG Singapore (SG) Monash University AU Australia (AU)

How to cite

APA:

Xing, K., Creedon, D.L., Yianni, S.A., Akhgar, G., Zhang, L., Ley, L.,... Pakes, C.I. (2020). Strong spin-orbit interaction induced by transition metal oxides at the surface of hydrogen-terminated diamond. Carbon, 164, 244-250. https://dx.doi.org/10.1016/j.carbon.2020.03.047

MLA:

Xing, Kaijian, et al. "Strong spin-orbit interaction induced by transition metal oxides at the surface of hydrogen-terminated diamond." Carbon 164 (2020): 244-250.

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