Quantum size effects in amorphous diamond-like carbon superlattices
Evidence for the existence of quantum size effects in amorphous diamond-like carbon superlattice structures from optical and electronic measurements together with theoretical predictions are reported. A `blue shift' in the optical gap is shown to occur with decreasing well width from which an e...
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| Veröffentlicht in: | Japanese Journal of Applied Physics 1994-12, Vol.33 (12A), p.6458-6465 |
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| container_end_page | 6465 |
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| container_issue | 12A |
| container_start_page | 6458 |
| container_title | Japanese Journal of Applied Physics |
| container_volume | 33 |
| creator | SILVA, S. R. P AMARATUNGA, G. A. J WOODBURN, C. N WELLAND, M. E HAQ, S |
| description | Evidence for the existence of quantum size effects in amorphous diamond-like carbon superlattice structures from optical and electronic measurements together with theoretical predictions are reported. A `blue shift' in the optical gap is shown to occur with decreasing well width from which an effective mass for the electrons (and holes) is obtained. Regions of negative differential resistance are observed in the current-voltage characteristics at temperatures ranging from 4–300 K. Dark conductivity studies point to a current that is dominated by a tunnelling component rather than thermal carrier emission over the barrier layers of the superlattice. Activation energy studies show an increase in the activation energy with decreasing well width, in keeping with the observed optical `blue shift'. The voltage range over which negative differential resistance is measured agrees well with resonant tunnelling predictions. |
| doi_str_mv | 10.1143/jjap.33.6458 |
| format | Article |
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R. P ; AMARATUNGA, G. A. J ; WOODBURN, C. N ; WELLAND, M. E ; HAQ, S</creator><creatorcontrib>SILVA, S. R. P ; AMARATUNGA, G. A. J ; WOODBURN, C. N ; WELLAND, M. E ; HAQ, S</creatorcontrib><description>Evidence for the existence of quantum size effects in amorphous diamond-like carbon superlattice structures from optical and electronic measurements together with theoretical predictions are reported. A `blue shift' in the optical gap is shown to occur with decreasing well width from which an effective mass for the electrons (and holes) is obtained. Regions of negative differential resistance are observed in the current-voltage characteristics at temperatures ranging from 4–300 K. Dark conductivity studies point to a current that is dominated by a tunnelling component rather than thermal carrier emission over the barrier layers of the superlattice. Activation energy studies show an increase in the activation energy with decreasing well width, in keeping with the observed optical `blue shift'. The voltage range over which negative differential resistance is measured agrees well with resonant tunnelling predictions.</description><identifier>ISSN: 0021-4922</identifier><identifier>EISSN: 1347-4065</identifier><identifier>DOI: 10.1143/jjap.33.6458</identifier><identifier>CODEN: JJAPA5</identifier><language>eng</language><publisher>Tokyo: Japanese journal of applied physics</publisher><subject>Amorphous semiconductors; glasses ; Amorphous semiconductors; glasses; nanocrystalline materials ; Condensed matter: electronic structure, electrical, magnetic, and optical properties ; Electronic structure and electrical properties of surfaces, interfaces, thin films and low-dimensional structures ; Electronic transport in interface structures ; Exact sciences and technology ; Optical properties and condensed-matter spectroscopy and other interactions of matter with particles and radiation ; Optical properties of specific thin films ; Physics ; Tunneling</subject><ispartof>Japanese Journal of Applied Physics, 1994-12, Vol.33 (12A), p.6458-6465</ispartof><rights>1995 INIST-CNRS</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c418t-cc351fd643f0573b500479856298c7e3e1d56ff726fc814ff96e3c19ce0c6e9e3</citedby><cites>FETCH-LOGICAL-c418t-cc351fd643f0573b500479856298c7e3e1d56ff726fc814ff96e3c19ce0c6e9e3</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>314,780,784,27924,27925</link.rule.ids><backlink>$$Uhttp://pascal-francis.inist.fr/vibad/index.php?action=getRecordDetail&idt=3345190$$DView record in Pascal Francis$$Hfree_for_read</backlink></links><search><creatorcontrib>SILVA, S. R. P</creatorcontrib><creatorcontrib>AMARATUNGA, G. A. J</creatorcontrib><creatorcontrib>WOODBURN, C. N</creatorcontrib><creatorcontrib>WELLAND, M. E</creatorcontrib><creatorcontrib>HAQ, S</creatorcontrib><title>Quantum size effects in amorphous diamond-like carbon superlattices</title><title>Japanese Journal of Applied Physics</title><description>Evidence for the existence of quantum size effects in amorphous diamond-like carbon superlattice structures from optical and electronic measurements together with theoretical predictions are reported. A `blue shift' in the optical gap is shown to occur with decreasing well width from which an effective mass for the electrons (and holes) is obtained. Regions of negative differential resistance are observed in the current-voltage characteristics at temperatures ranging from 4–300 K. Dark conductivity studies point to a current that is dominated by a tunnelling component rather than thermal carrier emission over the barrier layers of the superlattice. Activation energy studies show an increase in the activation energy with decreasing well width, in keeping with the observed optical `blue shift'. The voltage range over which negative differential resistance is measured agrees well with resonant tunnelling predictions.</description><subject>Amorphous semiconductors; glasses</subject><subject>Amorphous semiconductors; glasses; nanocrystalline materials</subject><subject>Condensed matter: electronic structure, electrical, magnetic, and optical properties</subject><subject>Electronic structure and electrical properties of surfaces, interfaces, thin films and low-dimensional structures</subject><subject>Electronic transport in interface structures</subject><subject>Exact sciences and technology</subject><subject>Optical properties and condensed-matter spectroscopy and other interactions of matter with particles and radiation</subject><subject>Optical properties of specific thin films</subject><subject>Physics</subject><subject>Tunneling</subject><issn>0021-4922</issn><issn>1347-4065</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>1994</creationdate><recordtype>article</recordtype><recordid>eNo9kEtPwzAQhC0EEqVw4wfkgDiRYmdtJzlWFa-qEiDB2XI3a-GSF3ZygF9PqiJOuyt9M9oZxi4FXwgh4Xa3s_0CYKGlKo7YTIDMU8m1OmYzzjORyjLLTtlZjLvp1EqKGVu9jrYdxiaJ_ocSco5wiIlvE9t0of_oxphUftrbKq39JyVow7Zrkzj2FGo7DB4pnrMTZ-tIF39zzt7v795Wj-nm-eFptdykKEUxpIighKu0BMdVDlvFuczLQumsLDAnIFEp7VyeaYeFkM6VmgBFicRRU0kwZ9cH3z50XyPFwTQ-ItW1bWl61EyRcj7FncCbA4ihizGQM33wjQ3fRnCzb8qs18sXA2D2TU341Z-vjWhrF2yLPv5rAKQSJYdfzalo9w</recordid><startdate>19941201</startdate><enddate>19941201</enddate><creator>SILVA, S. 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R. P</creatorcontrib><creatorcontrib>AMARATUNGA, G. A. J</creatorcontrib><creatorcontrib>WOODBURN, C. N</creatorcontrib><creatorcontrib>WELLAND, M. E</creatorcontrib><creatorcontrib>HAQ, S</creatorcontrib><collection>Pascal-Francis</collection><collection>CrossRef</collection><collection>Technology Research Database</collection><collection>Aerospace Database</collection><collection>Advanced Technologies Database with Aerospace</collection><jtitle>Japanese Journal of Applied Physics</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>SILVA, S. R. P</au><au>AMARATUNGA, G. A. J</au><au>WOODBURN, C. N</au><au>WELLAND, M. E</au><au>HAQ, S</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Quantum size effects in amorphous diamond-like carbon superlattices</atitle><jtitle>Japanese Journal of Applied Physics</jtitle><date>1994-12-01</date><risdate>1994</risdate><volume>33</volume><issue>12A</issue><spage>6458</spage><epage>6465</epage><pages>6458-6465</pages><issn>0021-4922</issn><eissn>1347-4065</eissn><coden>JJAPA5</coden><abstract>Evidence for the existence of quantum size effects in amorphous diamond-like carbon superlattice structures from optical and electronic measurements together with theoretical predictions are reported. A `blue shift' in the optical gap is shown to occur with decreasing well width from which an effective mass for the electrons (and holes) is obtained. Regions of negative differential resistance are observed in the current-voltage characteristics at temperatures ranging from 4–300 K. Dark conductivity studies point to a current that is dominated by a tunnelling component rather than thermal carrier emission over the barrier layers of the superlattice. Activation energy studies show an increase in the activation energy with decreasing well width, in keeping with the observed optical `blue shift'. The voltage range over which negative differential resistance is measured agrees well with resonant tunnelling predictions.</abstract><cop>Tokyo</cop><pub>Japanese journal of applied physics</pub><doi>10.1143/jjap.33.6458</doi><tpages>8</tpages></addata></record> |
| fulltext | fulltext |
| identifier | ISSN: 0021-4922 |
| ispartof | Japanese Journal of Applied Physics, 1994-12, Vol.33 (12A), p.6458-6465 |
| issn | 0021-4922 1347-4065 |
| language | eng |
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| source | Institute of Physics Journals |
| subjects | Amorphous semiconductors glasses Amorphous semiconductors glasses nanocrystalline materials Condensed matter: electronic structure, electrical, magnetic, and optical properties Electronic structure and electrical properties of surfaces, interfaces, thin films and low-dimensional structures Electronic transport in interface structures Exact sciences and technology Optical properties and condensed-matter spectroscopy and other interactions of matter with particles and radiation Optical properties of specific thin films Physics Tunneling |
| title | Quantum size effects in amorphous diamond-like carbon superlattices |
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