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pentahexoctite: A new two-dimensional allotrope of carbon

Sharma, Babu Ram and Manjanath, Aaditya and Singh, Abhishek K (2014) pentahexoctite: A new two-dimensional allotrope of carbon. In: SCIENTIFIC REPORTS, 4 .

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Official URL: http://dx.doi.org/10.1038/srep07164


The ability of carbon to exist in many forms across dimensions has spawned search in exploring newer allotropes consisting of either, different networks of polygons or rings. While research on various 3D phases of carbon has been extensive, 2D allotropes formed from stable rings are yet to be unearthed. Here, we report a new sp(2) hybridized two-dimensional allotrope consisting of continuous 5-6-8 rings of carbon atoms, named as ``pentahexoctite''. The absence of unstable modes in the phonon spectra ensures the stability of the planar sheet. Furthermore, this sheet has mechanical strength comparable to graphene. Electronically, the sheet is metallic with direction-dependent flat and dispersive bands at the Fermi level ensuring highly anisotropic transport properties. This sheet serves as a precursor for stable 1D nanotubes with chirality-dependent electronic and mechanical properties. With these unique properties, this sheet becomes another exciting addition to the family of robust novel 2D allotropes of carbon.

Item Type: Journal Article
Additional Information: Copyright for this article belongs to the NATURE PUBLISHING GROUP, MACMILLAN BUILDING, 4 CRINAN ST, LONDON N1 9XW, ENGLAND
Department/Centre: Division of Chemical Sciences > Materials Research Centre
Division of Interdisciplinary Sciences > Centre for Nano Science and Engineering
Date Deposited: 18 Jan 2015 06:38
Last Modified: 18 Jan 2015 06:38
URI: http://eprints.iisc.ac.in/id/eprint/50690

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