Interaction effects in a chaotic graphene quantum billiard
| Title: | Interaction effects in a chaotic graphene quantum billiard |
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| Authors: | Hagymasi, Imre, Vancso, Peter, Palinkas, Andras, Osvath, Zoltan |
| Source: | Phys. Rev. B 95, 075123 (2017) |
| Publication Year: | 2017 |
| Collection: | Condensed Matter Nonlinear Sciences |
| Subject Terms: | Condensed Matter - Mesoscale and Nanoscale Physics, Condensed Matter - Strongly Correlated Electrons, Nonlinear Sciences - Chaotic Dynamics |
| More Details: | We investigate the local electronic structure of a Sinai-like, quadrilateral graphene quantum billiard with zigzag and armchair edges using scanning tunneling microscopy at room temperature. It is revealed that besides the $(\sqrt{3}\times\sqrt{3})R30${\deg} superstructure, which is caused by the intervalley scattering, its overtones also appear in the STM measurements, which are attributed to the Umklapp processes. We point out that these results can be well understood by taking into account the Coulomb interaction in the quantum billiard, accounting for both the measured density of state values and the experimentally observed topography patterns. The analysis of the level-spacing distribution substantiates the experimental findings as well. We also reveal the magnetic properties of our system which should be relevant in future graphene based electronic and spintronic applications. Comment: 8 pages, 8 figures, accepted for publication in PRB |
| Document Type: | Working Paper |
| DOI: | 10.1103/PhysRevB.95.075123 |
| Access URL: | http://arxiv.org/abs/1701.08016 |
| Accession Number: | edsarx.1701.08016 |
| Database: | arXiv |
| DOI: | 10.1103/PhysRevB.95.075123 |
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