“School of Physic”
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| Paper IPM / Physic / 13472 |
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| Abstract: | |||||||
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The science for processing and control of electron spins is referred to as �??Spintronics�?�.
Metals, semiconductors, and in particular carbon-based materials are especially interesting in
this respect due to their spin arrangements. Graphene, a hexagonal two-dimensional structure
of carbon has attracted much attention due to its spin relaxation mechanism and many other
advantages. We discuss the origin of graphene's spin in nano-scale devices. A key concept for
understanding spin polarized state properties of graphene is Lieb's theorem, according to
which one can predict whether a graphene structure is spin-polarized. However, this theorem
cannot predict anything about magnetic properties of graphene. Lieb's theorem has many
important consequences including spin polarization of a supercell, and that quasi-localized
states populating complementary sublattices interact with each other. There exists a large
number of theoretical works, which study graphene spin polarization using theoretical
methods to investigate the magnetic properties of graphene. We will discuss these theoretical
works and their important consequences. In addition, several key experimental results for
graphene�??s spin Engineering are produced.
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