Wave packet dynamics in hydrogenated graphene at low hydrogen coverages
The dynamics of an electron's wave packet on hydrogenated graphene at low hydrogen coverages has been simulated using the tight-binding model. It is found that the bonding between the hydrogen and carbon atoms induces an impurity electron state at an energy of ≈ 0.14 eV above the Dirac crossing...
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| Veröffentlicht in: | Journal of physics. Condensed matter 2011-08, Vol.23 (34), p.345502-345502 |
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| container_issue | 34 |
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| container_title | Journal of physics. Condensed matter |
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| creator | QIFENG LIANG YA'NAN SONG YANG, Aping JINMING DONG |
| description | The dynamics of an electron's wave packet on hydrogenated graphene at low hydrogen coverages has been simulated using the tight-binding model. It is found that the bonding between the hydrogen and carbon atoms induces an impurity electron state at an energy of ≈ 0.14 eV above the Dirac crossing energy ED, at which the impurity's scattering of electrons is resonantly enhanced. The asymmetry found in the energy-dependent transmission is explained by the Fano resonance, which has never been mentioned before. The impurity state having positive energy bias and the asymmetrical electron transmission can be used to explain the asymmetrical transporting behaviors measured in the experiment. By comparing the numerical simulations for an ordered sample with those for a disordered one, we conclude that the interference plays an important role in the electron's localization on the hydrogenated graphene. |
| doi_str_mv | 10.1088/0953-8984/23/34/345502 |
| format | Article |
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It is found that the bonding between the hydrogen and carbon atoms induces an impurity electron state at an energy of ≈ 0.14 eV above the Dirac crossing energy ED, at which the impurity's scattering of electrons is resonantly enhanced. The asymmetry found in the energy-dependent transmission is explained by the Fano resonance, which has never been mentioned before. The impurity state having positive energy bias and the asymmetrical electron transmission can be used to explain the asymmetrical transporting behaviors measured in the experiment. By comparing the numerical simulations for an ordered sample with those for a disordered one, we conclude that the interference plays an important role in the electron's localization on the hydrogenated graphene.</description><identifier>ISSN: 0953-8984</identifier><identifier>EISSN: 1361-648X</identifier><identifier>DOI: 10.1088/0953-8984/23/34/345502</identifier><identifier>PMID: 21841227</identifier><identifier>CODEN: JCOMEL</identifier><language>eng</language><publisher>Bristol: Institute of Physics</publisher><subject>Asymmetry ; Computer simulation ; Condensed matter ; Condensed matter: electronic structure, electrical, magnetic, and optical properties ; Dynamics ; Electronic structure and electrical properties of surfaces, interfaces, thin films and low-dimensional structures ; Electronic transport in multilayers, nanoscale materials and structures ; Exact sciences and technology ; Graphene ; Hydrogen storage ; Impurities ; Physics ; Wave packets</subject><ispartof>Journal of physics. 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Condensed matter</title><addtitle>J Phys Condens Matter</addtitle><description>The dynamics of an electron's wave packet on hydrogenated graphene at low hydrogen coverages has been simulated using the tight-binding model. It is found that the bonding between the hydrogen and carbon atoms induces an impurity electron state at an energy of ≈ 0.14 eV above the Dirac crossing energy ED, at which the impurity's scattering of electrons is resonantly enhanced. The asymmetry found in the energy-dependent transmission is explained by the Fano resonance, which has never been mentioned before. The impurity state having positive energy bias and the asymmetrical electron transmission can be used to explain the asymmetrical transporting behaviors measured in the experiment. By comparing the numerical simulations for an ordered sample with those for a disordered one, we conclude that the interference plays an important role in the electron's localization on the hydrogenated graphene.</description><subject>Asymmetry</subject><subject>Computer simulation</subject><subject>Condensed matter</subject><subject>Condensed matter: electronic structure, electrical, magnetic, and optical properties</subject><subject>Dynamics</subject><subject>Electronic structure and electrical properties of surfaces, interfaces, thin films and low-dimensional structures</subject><subject>Electronic transport in multilayers, nanoscale materials and structures</subject><subject>Exact sciences and technology</subject><subject>Graphene</subject><subject>Hydrogen storage</subject><subject>Impurities</subject><subject>Physics</subject><subject>Wave packets</subject><issn>0953-8984</issn><issn>1361-648X</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2011</creationdate><recordtype>article</recordtype><recordid>eNqNkFFLwzAQx4Mobk6_wuiL4Etd0lya5FGGTmHgi6Jv4ZqmW7Vra9JN9u3t2Jyvwv25h_vdHfwIGTN6y6hSE6oFj5VWMEn4hENfQtDkhAwZT1mcgno_JcMjNCAXIXxQSkFxOCeDhClgSSKHZPaGGxe1aD9dF-XbGlelDVFZR8tt7puFq7FzebTw2C5d7SLsoqr5Pg4j22ycx4ULl-SswCq4q0MfkdeH-5fpYzx_nj1N7-ax5RK62Akqc4HKcdbHpiAFCp7RQiUyA-hjBQLLIWeSCp1SLLJCSi60lVZlBR-Rm_3d1jdfaxc6syqDdVWFtWvWwbBUMqFlqvQ_0ERw0FRDj6Z71PomBO8K0_pyhX5rGDU732an0uxUmoQbDmbvu18cH36ss5XLj2u_gnvg-gBgsFgVHmtbhj8OQHNGJf8BlHeHhQ</recordid><startdate>20110831</startdate><enddate>20110831</enddate><creator>QIFENG LIANG</creator><creator>YA'NAN SONG</creator><creator>YANG, Aping</creator><creator>JINMING DONG</creator><general>Institute of Physics</general><scope>IQODW</scope><scope>NPM</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7X8</scope><scope>7U5</scope><scope>8FD</scope><scope>L7M</scope></search><sort><creationdate>20110831</creationdate><title>Wave packet dynamics in hydrogenated graphene at low hydrogen coverages</title><author>QIFENG LIANG ; YA'NAN SONG ; YANG, Aping ; JINMING DONG</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c374t-e507d5a8e318e3c6475a53b0f827b447b4c5a41d4d1705960afbf77359c7c8bf3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2011</creationdate><topic>Asymmetry</topic><topic>Computer simulation</topic><topic>Condensed matter</topic><topic>Condensed matter: electronic structure, electrical, magnetic, and optical properties</topic><topic>Dynamics</topic><topic>Electronic structure and electrical properties of surfaces, interfaces, thin films and low-dimensional structures</topic><topic>Electronic transport in multilayers, nanoscale materials and structures</topic><topic>Exact sciences and technology</topic><topic>Graphene</topic><topic>Hydrogen storage</topic><topic>Impurities</topic><topic>Physics</topic><topic>Wave packets</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>QIFENG LIANG</creatorcontrib><creatorcontrib>YA'NAN SONG</creatorcontrib><creatorcontrib>YANG, Aping</creatorcontrib><creatorcontrib>JINMING DONG</creatorcontrib><collection>Pascal-Francis</collection><collection>PubMed</collection><collection>CrossRef</collection><collection>MEDLINE - Academic</collection><collection>Solid State and Superconductivity Abstracts</collection><collection>Technology Research Database</collection><collection>Advanced Technologies Database with Aerospace</collection><jtitle>Journal of physics. 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| source | IOP Publishing Journals; Institute of Physics (IOP) Journals - HEAL-Link |
| subjects | Asymmetry Computer simulation Condensed matter Condensed matter: electronic structure, electrical, magnetic, and optical properties Dynamics Electronic structure and electrical properties of surfaces, interfaces, thin films and low-dimensional structures Electronic transport in multilayers, nanoscale materials and structures Exact sciences and technology Graphene Hydrogen storage Impurities Physics Wave packets |
| title | Wave packet dynamics in hydrogenated graphene at low hydrogen coverages |
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