Academic Journal
Renormalization of the Graphene Dispersion Velocity Determined from Scanning Tunneling Spectroscopy
| العنوان: | Renormalization of the Graphene Dispersion Velocity Determined from Scanning Tunneling Spectroscopy |
|---|---|
| المؤلفون: | Chae, Jungseok, Jung, Suyong, Young, Andrea F, Dean, Cory R, Wang, Lei, Gao, Yuanda, Watanabe, Kenji, Taniguchi, Takashi, Hone, James, Shepard, Kenneth L |
| المساهمون: | COLUMBIA UNIV NEW YORK DEPT OF ELECTRICAL ENGINEERING |
| المصدر: | DTIC |
| سنة النشر: | 2012 |
| المجموعة: | Defense Technical Information Center: DTIC Technical Reports database |
| مصطلحات موضوعية: | Industrial Chemistry and Chemical Processing, Inorganic Chemistry, Physical Chemistry, ELECTRONS, GRAPHENE, ACCESS, CONICAL BODIES, EXCITATION, FERMI SURFACES, REPRINTS, SPECTROSCOPY, VELOCITY, SCANNING TUNNELING SPECTROSCOPY |
| الوصف: | In graphene, as in most metals, electron-electron interactions renormalize the properties of electrons but leave them behaving like noninteracting quasiparticles. Many measurements probe the renormalized properties of electrons right at the Fermi energy. Uniquely for graphene, the accessibility of the electrons at the surface offers the opportunity to use scanned probe techniques to examine the effect of interactions at energies away from the Fermi energy, over a broad range of densities, and on a local scale. Using scanning tunneling spectroscopy, we show that electron interactions leave the graphene energy dispersion linear as a function of excitation energy for energies within +-200 meV of the Fermi energy. However, the measured dispersion velocity depends on density and increases strongly as the density approaches zero near the charge neutrality point, revealing a squeezing of the Dirac cone due to interactions. ; Published in Physical Review Letters, v109 p116802-1/116802-5, 2012. |
| نوع الوثيقة: | text |
| وصف الملف: | text/html |
| اللغة: | English |
| Relation: | http://www.dtic.mil/docs/citations/ADA569096 |
| الاتاحة: | http://www.dtic.mil/docs/citations/ADA569096 http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=ADA569096 |
| Rights: | Approved for public release; distribution is unlimited. |
| رقم الانضمام: | edsbas.728986B6 |
| قاعدة البيانات: | BASE |
| الوصف غير متاح. |