Engineering the spin-orbit interaction in surface conducting diamond with a solid-state gate dielectric
Xing K, Tsai A, Creedon DL, Yianni SA, Mccallum JC, Ley L, Qi DC, Pakes CI (2020)
Publication Type: Journal article
Publication year: 2020
Journal
Book Volume: 116
Journal Issue: 17
DOI: 10.1063/5.0005690
Abstract
Hydrogen-terminated (H-terminated) diamond, when surface transfer doped, can support a sub-surface two-dimensional (2D) hole band that possesses a strong Rashba-type spin-orbit interaction. By incorporating a V2O5/Al2O3 bilayer gate dielectric in a diamond-based metal-oxide-semiconductor architecture, metallic surface conductivity can be maintained at low temperature, avoiding the carrier freeze out exhibited by devices with an Al2O3 gate dielectric alone. Hole densities of up to 2.5x10(13)cm(-2) are achieved by the electrostatic gating of the device, and the spin-orbit interaction strength can be tuned from 3.5 +/- 0.5meV to 8.4 +/- 0.5meV, with a concurrent reduction in the spin coherence length from 40 +/- 1nm to 27 +/- 1nm. The demonstration of a gated device architecture on the H-terminated that avoids the need to cycle the temperature, as is required for ionic liquid gating protocols, opens a pathway to engineering practical devices for the study and application of spin transport in diamond.
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APA:
Xing, K., Tsai, A., Creedon, D.L., Yianni, S.A., Mccallum, J.C., Ley, L.,... Pakes, C.I. (2020). Engineering the spin-orbit interaction in surface conducting diamond with a solid-state gate dielectric. Applied Physics Letters, 116(17). https://doi.org/10.1063/5.0005690
MLA:
Xing, Kaijian, et al. "Engineering the spin-orbit interaction in surface conducting diamond with a solid-state gate dielectric." Applied Physics Letters 116.17 (2020).
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