期刊名称：International Journal of Innovative Research in Science, Engineering and Technology
印刷版ISSN：2347-6710
电子版ISSN：2319-8753
出版年度：2014
卷号：3
期号：6
页码：14049
出版社：S&S Publications
摘要：Understanding and controlling the complex environment of solid–state quantum–bits is a centralchallenge in quantum information science and spintronics. We report on behavior of electron spin bath embedded ingraphene–like nanocarbon (GNCs) superlattice. The GNCs were few layered, mixed sp2–sp3 phase, and contained localheavy vacancy disorder. The electron spectroscopy for chemical analysis indicated that, ratio of sp2:sp3 was 2:3 withnative oxygen of ~ 6.75 atomic% attached to the sp3 sites. The spin transport data was obtained using electron spinresonance spectroscopy, carried out at 123–473K. Transport parameters were derived by deconvoluting Dysonianlinewidth, and estimating anisotropy in Lande’s g–factor. The parameters such as spin–spin, spin–lattice relaxationtime, and spin–orbit coupling constant were estimated and analyzed for their temperature and interdependence. Theanalysis revealed that, feeble magnetization exist due to charge inhomogeneities in GNCs yielding weak delocalizationof –electrons. However, this delocalization is sufficiently useful to provide desired spin degrees of freedom to the spinbath. Analysis showed that, the bath have, practically, no effect of 2p–oxygen orbital quenching, the O–impurityexisted in GNCs. These results open the door to understand coherent spin transport in GNCs. Designing spin bath withtuneable spin degrees of freedom is essential for solid state quantum–bits; vital organ of future quantum computationaldevice. Details are presented.
