Journal
SCIENCE AND TECHNOLOGY OF ADVANCED MATERIALS
Volume 15, Issue 6, Pages -Publisher
TAYLOR & FRANCIS LTD
DOI: 10.1088/1468-6996/15/6/064404
Keywords
silicene; two-dimensional materials; nanoelectronics; silicon
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Funding
- Grants-in-Aid for Scientific Research [26246002] Funding Source: KAKEN
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In its freestanding, yet hypothetical form, the Si counterpart of graphene called silicene is predicted to possess massless Dirac fermions and to exhibit an experimentally accessible quantum spin Hall effect. Such interesting electronic properties are not realized in twodimensional (2D) Si honeycomb lattices prepared recently on metallic substrates where the crystal and hybrid electronic structures of these ` epitaxial silicene' phases are strongly influenced by the substrate, and thus different from those predicted for isolated 2D structures. While the realization of such low-dimensional Si p materials has hardly been imagined previously, it is evident that the materials science behind silicene remains challenging. In this contribution, we will review our recent results that lead to an enhanced understanding of epitaxial silicene formed on diboride thin films, and discuss the remaining challenges that must be addressed in order to turn Si 2D nanostructures into technologically interesting nanoelectronic materials.
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