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Article: High-quality multiterminal suspended graphene devices
Title | High-quality multiterminal suspended graphene devices |
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Authors | |
Keywords | Multiterminal suspended graphene quantum Hall effect negative resistance graphene bilayer ballistic transport |
Issue Date | 2013 |
Citation | Nano Letters, 2013, v. 13, n. 11, p. 5165-5170 How to Cite? |
Abstract | We introduce a new scheme to realize suspended, multiterminal graphene structures that can be current annealed successfully to obtain uniform, very high quality devices. A key aspect is that the bulky metallic contacts are not connected directly to the part of graphene probed by transport measurements, but only through etched constriction, which prevents the contacts from acting invasively. The device high quality and uniformity is demonstrated by a reproducibly narrow (δn ∼ 109 cm-2) resistance peak around charge neutrality, by carrier mobility values exceeding 10 6 cm2 V-1 s-1, by the observation of integer quantum Hall plateaus starting at 30 mT and of symmetry broken states at about 200 mT, and by the occurrence of a negative multiterminal resistance directly proving the occurrence of ballistic transport. As these multiterminal devices enable measurements that cannot be done in a simpler two-terminal configuration, we anticipate that their use in future studies of graphene-based systems will be particularly relevant. © 2013 American Chemical Society. |
Persistent Identifier | http://hdl.handle.net/10722/262825 |
ISSN | 2023 Impact Factor: 9.6 2023 SCImago Journal Rankings: 3.411 |
ISI Accession Number ID |
DC Field | Value | Language |
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dc.contributor.author | Ki, Dong Keun | - |
dc.contributor.author | Morpurgo, Alberto F. | - |
dc.date.accessioned | 2018-10-08T02:47:11Z | - |
dc.date.available | 2018-10-08T02:47:11Z | - |
dc.date.issued | 2013 | - |
dc.identifier.citation | Nano Letters, 2013, v. 13, n. 11, p. 5165-5170 | - |
dc.identifier.issn | 1530-6984 | - |
dc.identifier.uri | http://hdl.handle.net/10722/262825 | - |
dc.description.abstract | We introduce a new scheme to realize suspended, multiterminal graphene structures that can be current annealed successfully to obtain uniform, very high quality devices. A key aspect is that the bulky metallic contacts are not connected directly to the part of graphene probed by transport measurements, but only through etched constriction, which prevents the contacts from acting invasively. The device high quality and uniformity is demonstrated by a reproducibly narrow (δn ∼ 109 cm-2) resistance peak around charge neutrality, by carrier mobility values exceeding 10 6 cm2 V-1 s-1, by the observation of integer quantum Hall plateaus starting at 30 mT and of symmetry broken states at about 200 mT, and by the occurrence of a negative multiterminal resistance directly proving the occurrence of ballistic transport. As these multiterminal devices enable measurements that cannot be done in a simpler two-terminal configuration, we anticipate that their use in future studies of graphene-based systems will be particularly relevant. © 2013 American Chemical Society. | - |
dc.language | eng | - |
dc.relation.ispartof | Nano Letters | - |
dc.subject | Multiterminal suspended graphene | - |
dc.subject | quantum Hall effect | - |
dc.subject | negative resistance | - |
dc.subject | graphene bilayer | - |
dc.subject | ballistic transport | - |
dc.title | High-quality multiterminal suspended graphene devices | - |
dc.type | Article | - |
dc.description.nature | link_to_subscribed_fulltext | - |
dc.identifier.doi | 10.1021/nl402462q | - |
dc.identifier.scopus | eid_2-s2.0-84887847560 | - |
dc.identifier.volume | 13 | - |
dc.identifier.issue | 11 | - |
dc.identifier.spage | 5165 | - |
dc.identifier.epage | 5170 | - |
dc.identifier.eissn | 1530-6992 | - |
dc.identifier.isi | WOS:000327111700028 | - |
dc.identifier.issnl | 1530-6984 | - |