Research

Supervisor: Prof. Andrea Brito Latgé
 * Research group at UFF:** [|Electronic Properties] [|of carbon based materials]

Advisors: Prof. Nancy Sandler and Sergio Ulloa
 * Research Group:** Nano Theory group at Ohio University

__**Electronic Transport in Graphene**__ We are interested in investigating electronic properties of graphene systems. We study these systems when they are subjected to external fields and different electronic confinements. Also we consider topological defects on the graphene sheet and we incorporate gauge fields into the Dirac equation, in the continuum limit. The main idea is to look for controllable mechanisms to change the physical properties of electronic transports to use these systems as sensors or electronic devices. Key-words: graphene systems; electronic transport; topological defects; gauge fields;


 * References (Curved Graphene Ring Structures):**

**Gauge fiels in graphene:**  > "Graphene bubbles with controllable curvature", > Applied /physics Letters 99, 093103 (2011)
 * M. A. H. Vozmediano et al., "Gauge Fileds in graphene", Physics Reports 496 (2010) 109-148.
 * Fernando de Juan, Alberto Cortijo, and María A. H. Vozmediano, "Charge inhomogeneities due to smooth ripples in graphene sheets", Phys. Rev. B 76, 165409 (2007).
 * Fernando de Juan, Mauricio Sturla,and María A. H. Vozmediano, "Space dependent Fermi velocity in strained graphene", @http://arxiv.org/pdf/1201.2656v1.pdf
 * N. Levy, S. A. Burke, K. L. Meaker, M. Panlasigui, A. Zettl, F. Guinea, A. H. Castro Neto, M. F. Crommie, "Strain-Induced Pseudo–Magnetic Fields Greater Than 300 Tesla in Graphene Nanobubbles", @http://www.sciencemag.org/content/329/5991/544.full.pdf
 * T. Georgiou, L. Britnell, P. Blake, R. V. Gorbachev, A. Gholinia, A. K. Geim, C. Casiraghi, and K. S. Novoselov

**Graphene ring structures:** 
 * A. R. Akhmerov and C. W. J. Beenakker, "Boundary conditions for Dirac fermions on a terminated honeycomb lattice", Phys. Rev. B 77, 085423 (2008).
 * Recher et al., "Aharonov-Bohm effect and broken valley degeneracy in graphene rings", Phys. Rev. B 76, 235404 (2007).
 * C-H Yan and L-F Wei, "Size effects in Aharonov-Bohm graphene rings", J. Phys.: Condens. Matter 22 (2010) 295503.
 * N. M. R. Peres et al., "Dirac electrons in graphene-based quantum wires and quantum dots", J.Phys.: Condens Matter 21 (2010) 344202.
 * Wakker et al., "Localization and circulating currents in curved graphene devices", Phys. Rev. B 84, 195427 (2011).
 * Kyung- Jooh Kim, Ya. M. Blanter, and Kang-Hun Ahn, "Interplay between real and pseudomagnetic ﬁeld in graphene with strain", Phys. Rev. B 84, 0801401 (2011).
 * Nina Abedpour, Reza Asgari, and F. Guinea, "Strains and pseudomagnetic fields in circular graphene rings", Phys. Rev. B 84, 115437(2011).
 * C. W. J. Beenakker, "Colloquim: Andreev reflection and Klein tunneling in graphene", Rev. Mod. Phys. 80, 1337-1354 (2008)