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Back Cover: Mechanical and electronic properties of stoichiometric silicene and germanene oxides from first‐principles (Phys. Status Solidi RRL 6/2013)
Author(s) -
Wang Yanli,
Ding Yi
Publication year - 2013
Publication title -
physica status solidi (rrl) – rapid research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.786
H-Index - 68
eISSN - 1862-6270
pISSN - 1862-6254
DOI - 10.1002/pssr.201370433
Subject(s) - germanene , silicene , graphene , materials science , zigzag , anisotropy , condensed matter physics , stoichiometry , band gap , nanotechnology , chemical physics , chemistry , physics , geometry , optoelectronics , quantum mechanics , mathematics
Analogous to graphene, silicene and germanene have been predicted for Si and Ge elements, respectively. Due to their peculiar buckling structures, the foreign atoms bind strongly to the silicene/germanene sheets, which could form functional nanostructures with intriguing properties. In their Rapid Research Letter on pp. 410–413 , Wang and Ding present a first‐principles study on the stoichiometric silicene and germanene oxides. It is found that the zigzag ether‐like conformation is the most energetically favorable structure for both silicene and germanene oxides. These nanosheets display pronounced mechanical anisotropy, and even exhibit unconventional auxetic behavior with negative Poisson ratio along certain directions. Comparing to the pristine counterparts, the oxidation transforms the semimetallic nanosheets into direct‐band‐gap semiconductors with anisotropic electronic structures. More interestingly, due to the anisotropic mechanical and electronic characteristics, these oxidized sheets possess axially high intrinsic charge mobilities, which are comparable to the graphene nanoribbons.