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 I. Pakes

doi:10.1016/j.carbon.2020.03.047

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 I. Pakes

School of Physics and Astronomy

Research output: Contribution to journal › Article › Research › peer-review

11 Citations (Scopus)

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.

Original language	English
Pages (from-to)	244-250
Number of pages	7
Journal	Carbon
Volume	164
DOIs	https://doi.org/10.1016/j.carbon.2020.03.047
Publication status	Published - 30 Aug 2020

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10.1016/j.carbon.2020.03.047

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@article{656dae1632bf49e88e6f2e6334a84942,

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

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.",

author = "Kaijian Xing and Creedon, {Daniel L.} and Yianni, {Steve A.} and Golrokh Akhgar and Lei Zhang and Lothar Ley and McCallum, {Jeffrey C.} and Qi, {Dong Chen} and Pakes, {Christopher I.}",

note = "Funding Information: 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. Funding Information: 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. Publisher Copyright: {\textcopyright} 2020 Elsevier Ltd Copyright: Copyright 2020 Elsevier B.V., All rights reserved.",

year = "2020",

month = aug,

day = "30",

doi = "10.1016/j.carbon.2020.03.047",

language = "English",

volume = "164",

pages = "244--250",

journal = "Carbon",

issn = "0008-6223",

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T1 - Strong spin-orbit interaction induced by transition metal oxides at the surface of hydrogen-terminated diamond

AU - Xing, Kaijian

AU - Creedon, Daniel L.

AU - Yianni, Steve A.

AU - Akhgar, Golrokh

AU - Zhang, Lei

AU - Ley, Lothar

AU - McCallum, Jeffrey C.

AU - Qi, Dong Chen

AU - Pakes, Christopher I.

N1 - Funding Information: 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. Funding Information: 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. Publisher Copyright: © 2020 Elsevier Ltd Copyright: Copyright 2020 Elsevier B.V., All rights reserved.

PY - 2020/8/30

Y1 - 2020/8/30

N2 - 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.

AB - 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.

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U2 - 10.1016/j.carbon.2020.03.047

DO - 10.1016/j.carbon.2020.03.047

M3 - Article

AN - SCOPUS:85083176776

VL - 164

SP - 244

EP - 250

JO - Carbon

JF - Carbon

SN - 0008-6223

ER -

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

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ARC Centre of Excellence in Future Low-energy Electronics Technologies

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

Abstract

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ARC Centre of Excellence in Future Low-energy Electronics Technologies

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