Direct observation of a dispersionless impurity band in hydrogenated graphene
We show with angle-resolved photoemission spectroscopy that a new energy band appears in the electronic structure of electron-doped hydrogenated monolayer graphene (H-graphene). Its occupation can be controlled with the hydrogen amount and allows for tuning of graphene’s doping level. Our calculatio...
| Main Authors: | , , , , , , , , , , , , , , , , , , |
|---|---|
| Other Authors: | |
| Format: | Article |
| Language: | en_US |
| Published: |
American Physical Society
2011
|
| Online Access: | http://hdl.handle.net/1721.1/65631 https://orcid.org/0000-0001-8492-2261 |
| _version_ | 1826205691744878592 |
|---|---|
| author | Haberer, D. Petaccia, L. Farjam, M. Taioli, S. Jafari, S. A. Nefedov, A. Zhang, W. Calliari, L. Scarduelli, G. Dora, B. Vyalikh, D. V. Pichler, T. Woll, Ch. Alfe, D. Simonucci, S. Dresselhaus, Mildred Knupfer, M. Buchner, B. Gruneis, A. |
| 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 Haberer, D. Petaccia, L. Farjam, M. Taioli, S. Jafari, S. A. Nefedov, A. Zhang, W. Calliari, L. Scarduelli, G. Dora, B. Vyalikh, D. V. Pichler, T. Woll, Ch. Alfe, D. Simonucci, S. Dresselhaus, Mildred Knupfer, M. Buchner, B. Gruneis, A. |
| author_sort | Haberer, D. |
| collection | MIT |
| description | We show with angle-resolved photoemission spectroscopy that a new energy band appears in the electronic structure of electron-doped hydrogenated monolayer graphene (H-graphene). Its occupation can be controlled with the hydrogen amount and allows for tuning of graphene’s doping level. Our calculations of the electronic structure of H-graphene suggest that this state is largely composed of hydrogen 1s orbitals and remains extended for low H coverages despite the random chemisorption of H. Further evidence for the existence of a hydrogen state is provided by x-ray absorption studies of undoped H-graphene which are clearly showing the emergence of an additional state in the vicinity of the pi* resonance. |
| first_indexed | 2024-09-23T13:17:05Z |
| format | Article |
| id | mit-1721.1/65631 |
| institution | Massachusetts Institute of Technology |
| language | en_US |
| last_indexed | 2024-09-23T13:17:05Z |
| publishDate | 2011 |
| publisher | American Physical Society |
| record_format | dspace |
| spelling | mit-1721.1/656312022-10-01T14:16:29Z Direct observation of a dispersionless impurity band in hydrogenated graphene Haberer, D. Petaccia, L. Farjam, M. Taioli, S. Jafari, S. A. Nefedov, A. Zhang, W. Calliari, L. Scarduelli, G. Dora, B. Vyalikh, D. V. Pichler, T. Woll, Ch. Alfe, D. Simonucci, S. Dresselhaus, Mildred Knupfer, M. Buchner, B. Gruneis, A. Massachusetts Institute of Technology. Department of Electrical Engineering and Computer Science Massachusetts Institute of Technology. Department of Physics Dresselhaus, Mildred Dresselhaus, Mildred We show with angle-resolved photoemission spectroscopy that a new energy band appears in the electronic structure of electron-doped hydrogenated monolayer graphene (H-graphene). Its occupation can be controlled with the hydrogen amount and allows for tuning of graphene’s doping level. Our calculations of the electronic structure of H-graphene suggest that this state is largely composed of hydrogen 1s orbitals and remains extended for low H coverages despite the random chemisorption of H. Further evidence for the existence of a hydrogen state is provided by x-ray absorption studies of undoped H-graphene which are clearly showing the emergence of an additional state in the vicinity of the pi* resonance. National Science Foundation (U.S.) (NSF/DMR 10-04147) 2011-09-09T18:25:34Z 2011-09-09T18:25:34Z 2011-04 2011-02 Article http://purl.org/eprint/type/JournalArticle 1098-0121 1550-235X http://hdl.handle.net/1721.1/65631 Haberer, D. et al. “Direct observation of a dispersionless impurity band in hydrogenated graphene.” Physical Review B 83 (2011). ©2011 American Physical Society. https://orcid.org/0000-0001-8492-2261 en_US http://dx.doi.org/10.1103/PhysRevB.83.165433 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 APS |
| spellingShingle | Haberer, D. Petaccia, L. Farjam, M. Taioli, S. Jafari, S. A. Nefedov, A. Zhang, W. Calliari, L. Scarduelli, G. Dora, B. Vyalikh, D. V. Pichler, T. Woll, Ch. Alfe, D. Simonucci, S. Dresselhaus, Mildred Knupfer, M. Buchner, B. Gruneis, A. Direct observation of a dispersionless impurity band in hydrogenated graphene |
| title | Direct observation of a dispersionless impurity band in hydrogenated graphene |
| title_full | Direct observation of a dispersionless impurity band in hydrogenated graphene |
| title_fullStr | Direct observation of a dispersionless impurity band in hydrogenated graphene |
| title_full_unstemmed | Direct observation of a dispersionless impurity band in hydrogenated graphene |
| title_short | Direct observation of a dispersionless impurity band in hydrogenated graphene |
| title_sort | direct observation of a dispersionless impurity band in hydrogenated graphene |
| url | http://hdl.handle.net/1721.1/65631 https://orcid.org/0000-0001-8492-2261 |
| work_keys_str_mv | AT habererd directobservationofadispersionlessimpuritybandinhydrogenatedgraphene AT petaccial directobservationofadispersionlessimpuritybandinhydrogenatedgraphene AT farjamm directobservationofadispersionlessimpuritybandinhydrogenatedgraphene AT taiolis directobservationofadispersionlessimpuritybandinhydrogenatedgraphene AT jafarisa directobservationofadispersionlessimpuritybandinhydrogenatedgraphene AT nefedova directobservationofadispersionlessimpuritybandinhydrogenatedgraphene AT zhangw directobservationofadispersionlessimpuritybandinhydrogenatedgraphene AT calliaril directobservationofadispersionlessimpuritybandinhydrogenatedgraphene AT scarduellig directobservationofadispersionlessimpuritybandinhydrogenatedgraphene AT dorab directobservationofadispersionlessimpuritybandinhydrogenatedgraphene AT vyalikhdv directobservationofadispersionlessimpuritybandinhydrogenatedgraphene AT pichlert directobservationofadispersionlessimpuritybandinhydrogenatedgraphene AT wollch directobservationofadispersionlessimpuritybandinhydrogenatedgraphene AT alfed directobservationofadispersionlessimpuritybandinhydrogenatedgraphene AT simonuccis directobservationofadispersionlessimpuritybandinhydrogenatedgraphene AT dresselhausmildred directobservationofadispersionlessimpuritybandinhydrogenatedgraphene AT knupferm directobservationofadispersionlessimpuritybandinhydrogenatedgraphene AT buchnerb directobservationofadispersionlessimpuritybandinhydrogenatedgraphene AT gruneisa directobservationofadispersionlessimpuritybandinhydrogenatedgraphene |