Quantum and classical confinement of resonant states in a trilayer graphene Fabry-Pérot interferometer
The advent of few-layer graphene has given rise to a new family of two-dimensional systems with emergent electronic properties governed by relativistic quantum mechanics. The multiple carbon sublattices endow the electronic wavefunctions with pseudospin, a lattice analogue of the relativistic electr...
| Main Authors: | , , , , , |
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| Other Authors: | |
| Format: | Article |
| Language: | en_US |
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Nature Publishing Group
2013
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| Online Access: | http://hdl.handle.net/1721.1/81313 https://orcid.org/0000-0001-8217-8213 |
| _version_ | 1826217135090696192 |
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| author | Campos, Leonardo Young, Andrea Franchini Surakitbovorn, Kawin Watanabe, K. Taniguchi, T. Jarillo-Herrero, Pablo |
| author2 | Massachusetts Institute of Technology. Department of Physics |
| author_facet | Massachusetts Institute of Technology. Department of Physics Campos, Leonardo Young, Andrea Franchini Surakitbovorn, Kawin Watanabe, K. Taniguchi, T. Jarillo-Herrero, Pablo |
| author_sort | Campos, Leonardo |
| collection | MIT |
| description | The advent of few-layer graphene has given rise to a new family of two-dimensional systems with emergent electronic properties governed by relativistic quantum mechanics. The multiple carbon sublattices endow the electronic wavefunctions with pseudospin, a lattice analogue of the relativistic electron spin, whereas the multilayer structure leads to electric-field-effect tunable electronic bands. Here we use these properties to realize giant conductance oscillations in ballistic trilayer graphene Fabry-Pérot interferometers, which result from phase coherent transport through resonant bound states beneath an electrostatic barrier. We confine these states by selectively decoupling them from the leads, resulting in transport via non-resonant states and suppression of the giant oscillations. The confinement is achieved both classically, by manipulating quasiparticle momenta with a magnetic field, and quantum mechanically, by locally varying the pseudospin character of the carrier wavefunctions. Our results illustrate the unique potential of trilayer graphene as a versatile platform for electron optics and pseudospintronics. |
| first_indexed | 2024-09-23T16:58:37Z |
| format | Article |
| id | mit-1721.1/81313 |
| institution | Massachusetts Institute of Technology |
| language | en_US |
| last_indexed | 2024-09-23T16:58:37Z |
| publishDate | 2013 |
| publisher | Nature Publishing Group |
| record_format | dspace |
| spelling | mit-1721.1/813132022-09-29T22:48:00Z Quantum and classical confinement of resonant states in a trilayer graphene Fabry-Pérot interferometer Campos, Leonardo Young, Andrea Franchini Surakitbovorn, Kawin Watanabe, K. Taniguchi, T. Jarillo-Herrero, Pablo Massachusetts Institute of Technology. Department of Physics Campos, Leonardo Young, Andrea Franchini Surakitbovorn, Kawin Jarillo-Herrero, Pablo The advent of few-layer graphene has given rise to a new family of two-dimensional systems with emergent electronic properties governed by relativistic quantum mechanics. The multiple carbon sublattices endow the electronic wavefunctions with pseudospin, a lattice analogue of the relativistic electron spin, whereas the multilayer structure leads to electric-field-effect tunable electronic bands. Here we use these properties to realize giant conductance oscillations in ballistic trilayer graphene Fabry-Pérot interferometers, which result from phase coherent transport through resonant bound states beneath an electrostatic barrier. We confine these states by selectively decoupling them from the leads, resulting in transport via non-resonant states and suppression of the giant oscillations. The confinement is achieved both classically, by manipulating quasiparticle momenta with a magnetic field, and quantum mechanically, by locally varying the pseudospin character of the carrier wavefunctions. Our results illustrate the unique potential of trilayer graphene as a versatile platform for electron optics and pseudospintronics. United States. Office of Naval Research (GATE MURI) National Science Foundation (U.S.) (Career Award DMR-0845287) Conselho Nacional de Pesquisas (Brazil) 2013-10-04T15:20:00Z 2013-10-04T15:20:00Z 2012-12 Article http://purl.org/eprint/type/JournalArticle 2041-1723 http://hdl.handle.net/1721.1/81313 Campos, L.C., A.F. Young, K. Surakitbovorn, K. Watanabe, T. Taniguchi, and P. Jarillo-Herrero. Quantum and Classical Confinement of Resonant States in a Trilayer Graphene Fabry-Pérot Interferometer. Nature Communications 3 (December 4, 2012): 1239. https://orcid.org/0000-0001-8217-8213 en_US http://dx.doi.org/10.1038/ncomms2243 Nature Communications 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 Nature Publishing Group arXiv |
| spellingShingle | Campos, Leonardo Young, Andrea Franchini Surakitbovorn, Kawin Watanabe, K. Taniguchi, T. Jarillo-Herrero, Pablo Quantum and classical confinement of resonant states in a trilayer graphene Fabry-Pérot interferometer |
| title | Quantum and classical confinement of resonant states in a trilayer graphene Fabry-Pérot interferometer |
| title_full | Quantum and classical confinement of resonant states in a trilayer graphene Fabry-Pérot interferometer |
| title_fullStr | Quantum and classical confinement of resonant states in a trilayer graphene Fabry-Pérot interferometer |
| title_full_unstemmed | Quantum and classical confinement of resonant states in a trilayer graphene Fabry-Pérot interferometer |
| title_short | Quantum and classical confinement of resonant states in a trilayer graphene Fabry-Pérot interferometer |
| title_sort | quantum and classical confinement of resonant states in a trilayer graphene fabry perot interferometer |
| url | http://hdl.handle.net/1721.1/81313 https://orcid.org/0000-0001-8217-8213 |
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