Inelastic scattering in a monolayer graphene sheet; a weak-localization study
| Autor: | Dong-Keun Ki, Hu-Jong Lee, Jae-Hyun Choi, Dongchan Jeong, Kee-Su Park |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2008 |
| Předmět: |
Physics
Magnetoresistance Condensed matter physics Condensed Matter - Mesoscale and Nanoscale Physics Graphene Scattering FOS: Physical sciences Inelastic scattering Condensed Matter Physics Electronic Optical and Magnetic Materials law.invention Weak localization law Mesoscale and Nanoscale Physics (cond-mat.mes-hall) Coulomb Charge carrier Graphite |
| Popis: | Charge carriers in a graphene sheet, a single layer of graphite, exhibit much distinctive characteristics to those in other two-dimensional electronic systems because of their chiral nature. In this report, we focus on the observation of weak localization in a graphene sheet exfoliated from a piece of natural graphite and nano-patterned into a Hall-bar geometry. Much stronger chiral-symmetry-breaking elastic intervalley scattering in our graphene sheet restores the conventional weak localization. The resulting carrier-density and temperature dependence of the phase coherence length reveal that the electron-electron interaction including a direct Coulomb interaction is the main inelastic scattering factor while electron-hole puddles enhance the inelastic scattering near the Dirac point. 12 pages, 3 figures, submitted to PRB |
| Databáze: | OpenAIRE |
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