dc.contributor.author | Polozkov, RG | |
dc.contributor.author | Senkevich, NY | |
dc.contributor.author | Morina, S | |
dc.contributor.author | Kuzhir, P | |
dc.contributor.author | Portnoi, ME | |
dc.contributor.author | Shelykh, IA | |
dc.date.accessioned | 2019-12-04T10:05:40Z | |
dc.date.issued | 2019-12-02 | |
dc.description.abstract | We use an ab initio approach to design and study a two-dimensional material—a planar array of carbon nanotubes separated by an optimal distance defined by the van der Waals interaction. We show that the energy spectrum for an array of quasimetallic nanotubes is described by a strongly anisotropic hyperbolic dispersion and formulate a model low-energy Hamiltonian for its semianalytical treatment. Periodic-potential-induced lifting of the valley degeneracy for an array of zigzag narrow-gap nanotubes leads to the band-gap collapse. In contrast, the band gap is opened in an array of gapless armchair tubes. These unusual spectra, marked by pronounced van Hove singularities in the low-energy density of states, open the opportunity for interesting physical effects and prospective optoelectronic applications. | en_GB |
dc.description.sponsorship | European Commission | en_GB |
dc.description.sponsorship | Research Executive Agency (REA) | en_GB |
dc.description.sponsorship | European Commission | en_GB |
dc.identifier.citation | Vol. 100 | en_GB |
dc.identifier.doi | 10.1103/physrevb.100.235401 | |
dc.identifier.grantnumber | 665440 | en_GB |
dc.identifier.grantnumber | 644076 | en_GB |
dc.identifier.grantnumber | 823878 | en_GB |
dc.identifier.uri | http://hdl.handle.net/10871/39935 | |
dc.language.iso | en | en_GB |
dc.publisher | American Physical Society (APS) | en_GB |
dc.rights | ©2019 American Physical Society | en_GB |
dc.subject | Band gap | en_GB |
dc.subject | First-principles calculations | en_GB |
dc.subject | Local density of states | en_GB |
dc.subject | van Hove singularity | en_GB |
dc.subject | Graphene | en_GB |
dc.subject | Nanotubes | en_GB |
dc.subject | Van der Waals systems | en_GB |
dc.subject | Band structure methods | en_GB |
dc.subject | Density functional theory | en_GB |
dc.title | Carbon nanotube array as a van der Waals two-dimensional hyperbolic material | en_GB |
dc.type | Article | en_GB |
dc.date.available | 2019-12-04T10:05:40Z | |
dc.identifier.issn | 2469-9950 | |
exeter.article-number | 235401 | en_GB |
dc.description | This is the final version. Available from American Physical Society (APS) via the DOI in this record. | en_GB |
dc.identifier.journal | Physical Review B | en_GB |
dc.rights.uri | http://www.rioxx.net/licenses/all-rights-reserved | en_GB |
dcterms.dateAccepted | 2019-10-17 | |
exeter.funder | ::European Commission | en_GB |
exeter.funder | ::European Commission | en_GB |
rioxxterms.version | VoR | en_GB |
rioxxterms.licenseref.startdate | 2019-12-02 | |
rioxxterms.type | Journal Article/Review | en_GB |
refterms.dateFCD | 2019-12-04T09:50:05Z | |
refterms.versionFCD | VoR | |
refterms.dateFOA | 2019-12-04T10:05:44Z | |
refterms.panel | B | en_GB |