Journal article

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

Kaijian Xing, Daniel L Creedon, Steve A Yianni, Golrokh Akhgar, Lei Zhang, Lothar Ley, Jeffrey C McCallum, Dong-Chen Qi, Christopher Pakes

CARBON | PERGAMON-ELSEVIER SCIENCE LTD | Published : 2020

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 a..

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Grants

Awarded by Australian Research Council


Funding Acknowledgements

This work was supported by the Australian Research Council under the Discovery Project (DP150101673) and Future Fellowship (FT60100207) schemes. D.Q. acknowledges the continuous support from the Queensland University of Technology (QUT) through the Centre for Materials Science. This work was performed in part at the University of Sydney: Bandwidth Foundary International, part of the OptoFab node of the Australian National Fabrication Facilities.