Quantum capacitance and density of states of graphene

We report on measurements of the quantum capacitance in graphene as a function of charge carrier density. A resonant LC-circuit giving high sensitivity to small capacitance changes is employed. The density of states, which is directly proportional to the quantum capacitance, is found to be significa...

Ausführliche Beschreibung

Gespeichert in:
Bibliographische Detailangaben
Veröffentlicht in:Applied physics letters 2010-04, Vol.96 (15), p.152104-152104-3
Hauptverfasser: Dröscher, S., Roulleau, P., Molitor, F., Studerus, P., Stampfer, C., Ensslin, K., Ihn, T.
Format: Artikel
Sprache:eng
Online-Zugang:Volltext
Tags: Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
container_end_page 152104-3
container_issue 15
container_start_page 152104
container_title Applied physics letters
container_volume 96
creator Dröscher, S.
Roulleau, P.
Molitor, F.
Studerus, P.
Stampfer, C.
Ensslin, K.
Ihn, T.
description We report on measurements of the quantum capacitance in graphene as a function of charge carrier density. A resonant LC-circuit giving high sensitivity to small capacitance changes is employed. The density of states, which is directly proportional to the quantum capacitance, is found to be significantly larger than zero at and around the charge neutrality point. This finding is interpreted to be a result of potential fluctuations with amplitudes of the order of 100 meV in good agreement with scanning single-electron transistor measurements on bulk graphene and transport studies on nanoribbons.
doi_str_mv 10.1063/1.3391670
format Article
fullrecord <record><control><sourceid>scitation_cross</sourceid><recordid>TN_cdi_crossref_primary_10_1063_1_3391670</recordid><sourceformat>XML</sourceformat><sourcesystem>PC</sourcesystem><sourcerecordid>apl</sourcerecordid><originalsourceid>FETCH-LOGICAL-c349t-e5c8fb74adc901d49ae782239b07c5ddcf71a72882794c0b9a3bf8e00ffd86293</originalsourceid><addsrcrecordid>eNp1z01LxDAQgOEgCq6rB_9Brx66ziRtkxw8yOIXLIig5zDNh1bctDTZw_57t2wPXjzNDLwMPIxdI6wQGnGLKyE0NhJO2AJBylIgqlO2AABRNrrGc3aR0vfhrLkQC1a_7Sjm3bawNJDtMkXrC4qucD6mLu-LPhQpU_Zp2j5HGr589JfsLNBP8lfzXLKPx4f39XO5eX16Wd9vSisqnUtfWxVaWZGzGtBVmrxUnAvdgrS1czZIJMmV4lJXFlpNog3KA4TgVMO1WLKb41879imNPphh7LY07g2CmbwGzew9tHfHNk2M3PXx_3hGmz9o8QvAjlxv</addsrcrecordid><sourcetype>Aggregation Database</sourcetype><iscdi>true</iscdi><recordtype>article</recordtype></control><display><type>article</type><title>Quantum capacitance and density of states of graphene</title><source>AIP Journals Complete</source><source>AIP Digital Archive</source><source>Alma/SFX Local Collection</source><creator>Dröscher, S. ; Roulleau, P. ; Molitor, F. ; Studerus, P. ; Stampfer, C. ; Ensslin, K. ; Ihn, T.</creator><creatorcontrib>Dröscher, S. ; Roulleau, P. ; Molitor, F. ; Studerus, P. ; Stampfer, C. ; Ensslin, K. ; Ihn, T.</creatorcontrib><description>We report on measurements of the quantum capacitance in graphene as a function of charge carrier density. A resonant LC-circuit giving high sensitivity to small capacitance changes is employed. The density of states, which is directly proportional to the quantum capacitance, is found to be significantly larger than zero at and around the charge neutrality point. This finding is interpreted to be a result of potential fluctuations with amplitudes of the order of 100 meV in good agreement with scanning single-electron transistor measurements on bulk graphene and transport studies on nanoribbons.</description><identifier>ISSN: 0003-6951</identifier><identifier>EISSN: 1077-3118</identifier><identifier>DOI: 10.1063/1.3391670</identifier><identifier>CODEN: APPLAB</identifier><language>eng</language><publisher>American Institute of Physics</publisher><ispartof>Applied physics letters, 2010-04, Vol.96 (15), p.152104-152104-3</ispartof><rights>2010 American Institute of Physics</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c349t-e5c8fb74adc901d49ae782239b07c5ddcf71a72882794c0b9a3bf8e00ffd86293</citedby><cites>FETCH-LOGICAL-c349t-e5c8fb74adc901d49ae782239b07c5ddcf71a72882794c0b9a3bf8e00ffd86293</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://pubs.aip.org/apl/article-lookup/doi/10.1063/1.3391670$$EHTML$$P50$$Gscitation$$H</linktohtml><link.rule.ids>314,780,784,794,1559,4512,27924,27925,76384,76390</link.rule.ids></links><search><creatorcontrib>Dröscher, S.</creatorcontrib><creatorcontrib>Roulleau, P.</creatorcontrib><creatorcontrib>Molitor, F.</creatorcontrib><creatorcontrib>Studerus, P.</creatorcontrib><creatorcontrib>Stampfer, C.</creatorcontrib><creatorcontrib>Ensslin, K.</creatorcontrib><creatorcontrib>Ihn, T.</creatorcontrib><title>Quantum capacitance and density of states of graphene</title><title>Applied physics letters</title><description>We report on measurements of the quantum capacitance in graphene as a function of charge carrier density. A resonant LC-circuit giving high sensitivity to small capacitance changes is employed. The density of states, which is directly proportional to the quantum capacitance, is found to be significantly larger than zero at and around the charge neutrality point. This finding is interpreted to be a result of potential fluctuations with amplitudes of the order of 100 meV in good agreement with scanning single-electron transistor measurements on bulk graphene and transport studies on nanoribbons.</description><issn>0003-6951</issn><issn>1077-3118</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2010</creationdate><recordtype>article</recordtype><recordid>eNp1z01LxDAQgOEgCq6rB_9Brx66ziRtkxw8yOIXLIig5zDNh1bctDTZw_57t2wPXjzNDLwMPIxdI6wQGnGLKyE0NhJO2AJBylIgqlO2AABRNrrGc3aR0vfhrLkQC1a_7Sjm3bawNJDtMkXrC4qucD6mLu-LPhQpU_Zp2j5HGr589JfsLNBP8lfzXLKPx4f39XO5eX16Wd9vSisqnUtfWxVaWZGzGtBVmrxUnAvdgrS1czZIJMmV4lJXFlpNog3KA4TgVMO1WLKb41879imNPphh7LY07g2CmbwGzew9tHfHNk2M3PXx_3hGmz9o8QvAjlxv</recordid><startdate>20100412</startdate><enddate>20100412</enddate><creator>Dröscher, S.</creator><creator>Roulleau, P.</creator><creator>Molitor, F.</creator><creator>Studerus, P.</creator><creator>Stampfer, C.</creator><creator>Ensslin, K.</creator><creator>Ihn, T.</creator><general>American Institute of Physics</general><scope>AAYXX</scope><scope>CITATION</scope></search><sort><creationdate>20100412</creationdate><title>Quantum capacitance and density of states of graphene</title><author>Dröscher, S. ; Roulleau, P. ; Molitor, F. ; Studerus, P. ; Stampfer, C. ; Ensslin, K. ; Ihn, T.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c349t-e5c8fb74adc901d49ae782239b07c5ddcf71a72882794c0b9a3bf8e00ffd86293</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2010</creationdate><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Dröscher, S.</creatorcontrib><creatorcontrib>Roulleau, P.</creatorcontrib><creatorcontrib>Molitor, F.</creatorcontrib><creatorcontrib>Studerus, P.</creatorcontrib><creatorcontrib>Stampfer, C.</creatorcontrib><creatorcontrib>Ensslin, K.</creatorcontrib><creatorcontrib>Ihn, T.</creatorcontrib><collection>CrossRef</collection><jtitle>Applied physics letters</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Dröscher, S.</au><au>Roulleau, P.</au><au>Molitor, F.</au><au>Studerus, P.</au><au>Stampfer, C.</au><au>Ensslin, K.</au><au>Ihn, T.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Quantum capacitance and density of states of graphene</atitle><jtitle>Applied physics letters</jtitle><date>2010-04-12</date><risdate>2010</risdate><volume>96</volume><issue>15</issue><spage>152104</spage><epage>152104-3</epage><pages>152104-152104-3</pages><issn>0003-6951</issn><eissn>1077-3118</eissn><coden>APPLAB</coden><abstract>We report on measurements of the quantum capacitance in graphene as a function of charge carrier density. A resonant LC-circuit giving high sensitivity to small capacitance changes is employed. The density of states, which is directly proportional to the quantum capacitance, is found to be significantly larger than zero at and around the charge neutrality point. This finding is interpreted to be a result of potential fluctuations with amplitudes of the order of 100 meV in good agreement with scanning single-electron transistor measurements on bulk graphene and transport studies on nanoribbons.</abstract><pub>American Institute of Physics</pub><doi>10.1063/1.3391670</doi></addata></record>
fulltext fulltext
identifier ISSN: 0003-6951
ispartof Applied physics letters, 2010-04, Vol.96 (15), p.152104-152104-3
issn 0003-6951
1077-3118
language eng
recordid cdi_crossref_primary_10_1063_1_3391670
source AIP Journals Complete; AIP Digital Archive; Alma/SFX Local Collection
title Quantum capacitance and density of states of graphene
url https://sfx.bib-bvb.de/sfx_tum?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&ctx_tim=2024-12-25T16%3A08%3A21IST&url_ver=Z39.88-2004&url_ctx_fmt=infofi/fmt:kev:mtx:ctx&rfr_id=info:sid/primo.exlibrisgroup.com:primo3-Article-scitation_cross&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.atitle=Quantum%20capacitance%20and%20density%20of%20states%20of%20graphene&rft.jtitle=Applied%20physics%20letters&rft.au=Dr%C3%B6scher,%20S.&rft.date=2010-04-12&rft.volume=96&rft.issue=15&rft.spage=152104&rft.epage=152104-3&rft.pages=152104-152104-3&rft.issn=0003-6951&rft.eissn=1077-3118&rft.coden=APPLAB&rft_id=info:doi/10.1063/1.3391670&rft_dat=%3Cscitation_cross%3Eapl%3C/scitation_cross%3E%3Curl%3E%3C/url%3E&disable_directlink=true&sfx.directlink=off&sfx.report_link=0&rft_id=info:oai/&rft_id=info:pmid/&rfr_iscdi=true