Strong magnetophonon resonance induced triple G-mode splitting in graphene on graphite probed by micromagneto Raman spectroscopy
The resonance between the G-band phonon excitation and Landau level optical transitions in graphene has been systematically studied by micromagneto Raman mapping. In purely decoupled graphene regions on a graphite substrate, eight traces of anticrossing spectral features with G-mode peaks are observ...
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| Format: | Article |
| Language: | en_US |
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American Physical Society
2014
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| Online Access: | http://hdl.handle.net/1721.1/88722 https://orcid.org/0000-0001-8492-2261 |
| _version_ | 1811081238498246656 |
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| author | Qiu, Caiyu Shen, Xiaonan Cao, Bingchen Cong, Chunxiao Saito, Riichiro Yu, Jingjiang Yu, Ting Dresselhaus, Mildred |
| author2 | Massachusetts Institute of Technology. Department of Electrical Engineering and Computer Science |
| author_facet | Massachusetts Institute of Technology. Department of Electrical Engineering and Computer Science Qiu, Caiyu Shen, Xiaonan Cao, Bingchen Cong, Chunxiao Saito, Riichiro Yu, Jingjiang Yu, Ting Dresselhaus, Mildred |
| author_sort | Qiu, Caiyu |
| collection | MIT |
| description | The resonance between the G-band phonon excitation and Landau level optical transitions in graphene has been systematically studied by micromagneto Raman mapping. In purely decoupled graphene regions on a graphite substrate, eight traces of anticrossing spectral features with G-mode peaks are observed as a function of magnetic fields up to 9 T, and these traces correspond to either symmetric or asymmetric Landau level transitions. Three distinct split peaks of the G mode, named G[subscript −], G[subscript i], and G[subscript +], are observed at the strong magnetophonon resonance condition corresponding to a magnetic field of ∼4.65 T. These three special modes are attributed to (i) the coupling between the G phonon and the magneto-optical transitions, which is responsible for G[subscript +] and G[subscript −] and can be well described by the two coupled mode model and (ii) the magnetic field-dependent oscillation of the G[subscript i] band, which is currently explained by the G band of graphite modified by the interaction with G[subscript +] and G[subscript −]. The pronounced interaction between Dirac fermions and phonons demonstrates a dramatically small Landau level width (∼1.3 meV), which is a signature of the ultrahigh quality graphene obtained on the surface of graphite. |
| first_indexed | 2024-09-23T11:43:38Z |
| format | Article |
| id | mit-1721.1/88722 |
| institution | Massachusetts Institute of Technology |
| language | en_US |
| last_indexed | 2024-09-23T11:43:38Z |
| publishDate | 2014 |
| publisher | American Physical Society |
| record_format | dspace |
| spelling | mit-1721.1/887222022-09-27T21:27:51Z Strong magnetophonon resonance induced triple G-mode splitting in graphene on graphite probed by micromagneto Raman spectroscopy Qiu, Caiyu Shen, Xiaonan Cao, Bingchen Cong, Chunxiao Saito, Riichiro Yu, Jingjiang Yu, Ting Dresselhaus, Mildred Massachusetts Institute of Technology. Department of Electrical Engineering and Computer Science Massachusetts Institute of Technology. Department of Physics Dresselhaus, Mildred The resonance between the G-band phonon excitation and Landau level optical transitions in graphene has been systematically studied by micromagneto Raman mapping. In purely decoupled graphene regions on a graphite substrate, eight traces of anticrossing spectral features with G-mode peaks are observed as a function of magnetic fields up to 9 T, and these traces correspond to either symmetric or asymmetric Landau level transitions. Three distinct split peaks of the G mode, named G[subscript −], G[subscript i], and G[subscript +], are observed at the strong magnetophonon resonance condition corresponding to a magnetic field of ∼4.65 T. These three special modes are attributed to (i) the coupling between the G phonon and the magneto-optical transitions, which is responsible for G[subscript +] and G[subscript −] and can be well described by the two coupled mode model and (ii) the magnetic field-dependent oscillation of the G[subscript i] band, which is currently explained by the G band of graphite modified by the interaction with G[subscript +] and G[subscript −]. The pronounced interaction between Dirac fermions and phonons demonstrates a dramatically small Landau level width (∼1.3 meV), which is a signature of the ultrahigh quality graphene obtained on the surface of graphite. National Science Foundation (U.S.). Division of Materials Research (10-04147) 2014-08-15T16:38:01Z 2014-08-15T16:38:01Z 2013-10 2013-04 Article http://purl.org/eprint/type/JournalArticle 1098-0121 1550-235X http://hdl.handle.net/1721.1/88722 Qiu, Caiyu, Xiaonan Shen, Bingchen Cao, Chunxiao Cong, Riichiro Saito, Jingjiang Yu, Mildred S. Dresselhaus, and Ting Yu. “Strong Magnetophonon Resonance Induced Triple G-Mode Splitting in Graphene on Graphite Probed by Micromagneto Raman Spectroscopy.” Phys. Rev. B 88, no. 16 (October 2013). © 2013 American Physical Society https://orcid.org/0000-0001-8492-2261 en_US http://dx.doi.org/10.1103/PhysRevB.88.165407 Physical Review B 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 American Physical Society American Physical Society |
| spellingShingle | Qiu, Caiyu Shen, Xiaonan Cao, Bingchen Cong, Chunxiao Saito, Riichiro Yu, Jingjiang Yu, Ting Dresselhaus, Mildred Strong magnetophonon resonance induced triple G-mode splitting in graphene on graphite probed by micromagneto Raman spectroscopy |
| title | Strong magnetophonon resonance induced triple G-mode splitting in graphene on graphite probed by micromagneto Raman spectroscopy |
| title_full | Strong magnetophonon resonance induced triple G-mode splitting in graphene on graphite probed by micromagneto Raman spectroscopy |
| title_fullStr | Strong magnetophonon resonance induced triple G-mode splitting in graphene on graphite probed by micromagneto Raman spectroscopy |
| title_full_unstemmed | Strong magnetophonon resonance induced triple G-mode splitting in graphene on graphite probed by micromagneto Raman spectroscopy |
| title_short | Strong magnetophonon resonance induced triple G-mode splitting in graphene on graphite probed by micromagneto Raman spectroscopy |
| title_sort | strong magnetophonon resonance induced triple g mode splitting in graphene on graphite probed by micromagneto raman spectroscopy |
| url | http://hdl.handle.net/1721.1/88722 https://orcid.org/0000-0001-8492-2261 |
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