Home Page Researchers Dan Gazit

Doron Gazit

The Racah Institute of Physics
Faculty of Science
The Hebrew University of Jerusalem, Jerusalem 91904, Israel
Tel:   972-2-6585176, Fax: 972-2-6584461
Website: http://www.phys.huji.ac.il/~gdoron/

Nanostructure of Graphene – characteristics and interplay with electrical properties

Dr. Doron Gazit joined the Hebrew University faculty at the beginning of 2010.
Dr. Gazit's relevant research focuses on Graphene, the two-dimensional nanomaterial coined: "the new silicon". The isolation of Graphene in 2004 has lead to awarding a Nobel prize in 2010 to Prof. Andre Geim and Prof. Kostya Novoselov. It has created a shock wave in the scientific world, echoing in physics, chemistry and electrical engineering. Made of a single sheet of carbon atoms, Graphene is the ultimate crystalline membrane. Its low-energy electronic structure is analogous to quantum electrodynamics (QED), and allows record high electron mobility. For these reasons, Graphene is considered not only as a "table-top" apparatus for the research of QED, but also as a prospective material for the next generation of electronics, combining previously unimaginable miniaturization with unprecedented characteristics. Dr. Gazit focuses on the structure of Graphene, and its interplay with the unique electronic properties, which are key elements for any future nanotechnological applications and scientific use of Graphene.

The structure of Graphene reveals unique features. In particular, ripples and charge inhomogeneities are found on the surface. Dr. Gazit, in a recent work, has given a theoretical explanation for these two previously unexplained phenomena, tracing their origin to the free electrons in the membrane. This system – an electronic crystalline membrane – is found to be prone to charge inhomogeneities. These charge fluctuations couple to the topography of the membrane, and induce ripples with the same characteristic size.

For doped Graphene, the interplay between the structure and the electronic properties is even more pronounced, as Dr. Gazit predicts in a recent publication, since the size of the ripples changes as a function of the doping level. This opens a path to future applications in the field of lasers and electrical grating of the membranes

Specific research topics related to Nanoscience and Nanotechnology:

  • Electrical grating of Graphene, and its possible applications.
  • The structure of Graphene
  • Interplay between structure and transport properties of Graphene.
  • Lifshitz points in Graphene, and their effect on the resistivity of the material.
  • Topographic phases of liquid crystals and biological systems.

Significant publications:

  • "Solar fusion cross sections. II. The pp chain and CNO cycles", E. Adelberger, D. Gazit, et al.,Reviews of Modern Physics 83, 195 (2011)
  • "Three-Nucleon Low-Energy Constants from the Consistency of Interactions and Currents in Chiral Effective Field Theory", D. Gazit, S. Quaglioni, P. Navratil, Physical Review Letters, 103, 102502 (2009), [arXiv:0812.4444 [nucl-th]].
  • "Photoabsorption on 4He with a realistic nuclear force", D. Gazit, S. Bacca, N. Barnea, W. Leidemann and G. Orlandini, Physical Review Letters 96, 112301 (2006) [arXiv:nucl-th/0512038].
  • "Neutrino Breakup of A=3 Nuclei in Supernovae", E. O?Connor, D. Gazit, C. J. Horowitz, A. Schwenk and N. Barnea, Physical Review C 75, 055803 (2007) [arXiv:nucl-th/0702044].
  • "Low-Energy Inelastic Neutrino Reactions on 4He", D. Gazit and N. Barnea, Physical Review Letters 98, 192501 (2007) [arXiv:nucl-th/0701028].

Research grants:

ARCHES, together with Prof. Dr. Achim Schwenk (2011-2015)

Distinctions and awards:

  • BMBF Award for Research Cooperation and High Excellence in Science (ARCHES) 2010.
  • Nuclear Physics A Young Scientist Award (2008).

Students, postdocs and researchers:

Ph.D. students: Hilla Deleon.
M.Sc students: Sergiu Lupo, Eyal Segev.

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