Peierls-Type Instability and Tunable Band Gap in Functionalized Graphene
Functionalizing graphene was recently shown to have a dramatic effect on the electronic properties of this material. Here we investigate spatial ordering of adatoms driven by the RKKY-type interactions. In the ordered state, which arises via a Peierls-instability-type mechanism, the adatoms reside m...
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| Other Authors: | |
| Format: | Article |
| Language: | en_US |
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American Physical Society
2014
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| Online Access: | http://hdl.handle.net/1721.1/88510 https://orcid.org/0000-0002-4268-731X |
| _version_ | 1826198375925547008 |
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| author | Abanin, Dmitry A. Shytov, A. V. Levitov, Leonid |
| author2 | Massachusetts Institute of Technology. Department of Physics |
| author_facet | Massachusetts Institute of Technology. Department of Physics Abanin, Dmitry A. Shytov, A. V. Levitov, Leonid |
| author_sort | Abanin, Dmitry A. |
| collection | MIT |
| description | Functionalizing graphene was recently shown to have a dramatic effect on the electronic properties of this material. Here we investigate spatial ordering of adatoms driven by the RKKY-type interactions. In the ordered state, which arises via a Peierls-instability-type mechanism, the adatoms reside mainly on one of the two graphene sublattices. Bragg scattering of electron waves induced by sublattice symmetry breaking results in a band gap opening, whereby Dirac fermions acquire a finite mass. The band gap is found to be immune to the adatoms’ positional disorder, with only an exponentially small number of localized states residing in the gap. The gapped state is stabilized in a wide range of electron doping. Our findings show that controlled adsorption of adatoms or molecules provides a route to engineering a tunable band gap in graphene. |
| first_indexed | 2024-09-23T11:03:54Z |
| format | Article |
| id | mit-1721.1/88510 |
| institution | Massachusetts Institute of Technology |
| language | en_US |
| last_indexed | 2024-09-23T11:03:54Z |
| publishDate | 2014 |
| publisher | American Physical Society |
| record_format | dspace |
| spelling | mit-1721.1/885102022-09-27T16:51:52Z Peierls-Type Instability and Tunable Band Gap in Functionalized Graphene Abanin, Dmitry A. Shytov, A. V. Levitov, Leonid Massachusetts Institute of Technology. Department of Physics Levitov, Leonid Functionalizing graphene was recently shown to have a dramatic effect on the electronic properties of this material. Here we investigate spatial ordering of adatoms driven by the RKKY-type interactions. In the ordered state, which arises via a Peierls-instability-type mechanism, the adatoms reside mainly on one of the two graphene sublattices. Bragg scattering of electron waves induced by sublattice symmetry breaking results in a band gap opening, whereby Dirac fermions acquire a finite mass. The band gap is found to be immune to the adatoms’ positional disorder, with only an exponentially small number of localized states residing in the gap. The gapped state is stabilized in a wide range of electron doping. Our findings show that controlled adsorption of adatoms or molecules provides a route to engineering a tunable band gap in graphene. United States. Office of Naval Research (Grant N00014-09-1-0724) 2014-07-28T20:08:36Z 2014-07-28T20:08:36Z 2010-08 2010-04 Article http://purl.org/eprint/type/JournalArticle 0031-9007 1079-7114 http://hdl.handle.net/1721.1/88510 Abanin, D. A., A. V. Shytov, and L. S. Levitov. “Peierls-Type Instability and Tunable Band Gap in Functionalized Graphene.” Physical Review Letters 105, no. 8 (August 2010). © 2010 The American Physical Society https://orcid.org/0000-0002-4268-731X en_US http://dx.doi.org/10.1103/PhysRevLett.105.086802 Physical Review Letters Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use. application/pdf American Physical Society APS |
| spellingShingle | Abanin, Dmitry A. Shytov, A. V. Levitov, Leonid Peierls-Type Instability and Tunable Band Gap in Functionalized Graphene |
| title | Peierls-Type Instability and Tunable Band Gap in Functionalized Graphene |
| title_full | Peierls-Type Instability and Tunable Band Gap in Functionalized Graphene |
| title_fullStr | Peierls-Type Instability and Tunable Band Gap in Functionalized Graphene |
| title_full_unstemmed | Peierls-Type Instability and Tunable Band Gap in Functionalized Graphene |
| title_short | Peierls-Type Instability and Tunable Band Gap in Functionalized Graphene |
| title_sort | peierls type instability and tunable band gap in functionalized graphene |
| url | http://hdl.handle.net/1721.1/88510 https://orcid.org/0000-0002-4268-731X |
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