Journal article
Spin-orbit interaction in a two-dimensional hole gas at the surface of hydrogenated diamond
MT Edmonds, LH Willems Van Beveren, O Klochan, J Cervenka, K Ganesan, S Prawer, L Ley, AR Hamilton, CI Pakes
Nano Letters | Published : 2015
DOI: 10.1021/nl502081y
Abstract
Hydrogenated diamond possesses a unique surface conductivity as a result of transfer doping by surface acceptors. Yet, despite being extensively studied for the past two decades, little is known about the system at low temperature, particularly whether a two-dimensional hole gas forms at the diamond surface. Here we report that (100) diamond, when functionalized with hydrogen, supports a p-type spin-3/2 two-dimensional surface conductivity with a spin-orbit interaction of 9.74 ± 0.1 meV through the observation of weak antilocalization effects in magneto-conductivity measurements at low temperature. Fits to 2D localization theory yield a spin relaxation length of 30 ± 1 nm and a spin-relaxati..
View full abstractGrants
Awarded by Australian Research Council
Funding Acknowledgements
This work was supported by the Australian Research Council Grant No. DP0879827, the Australian Nanotechnology Network, Department of Innovation, Industry, Science and Research and the Australian Synchrotron. M.T.E. would like thank both the Quantum Electronic Devices Group at the University of New South Wales and the Department of Physics at the University of Melbourne for their generous hospitality. We thank Oleg Sushkov for helpful discussions.