We study electronic transport in quantum-dot structures made of graphene. Focusing on the rectangular dot geometry and utilizing the non-equilibrium Green's function to calculate the transmission in the tight-binding framework, we find significant fluctuations in the transmission as a function of the electron energy. The fluctuations are correlated with the formation of quantum scarring states, or pointer states in the dot. Both enhancement and suppression of transmission have been observed. As the size of the quantum dot is increased, more scarring states can be formed, leading to stronger transmission or conductance fluctuations.

Original languageEnglish (US)
Article number344203
JournalJournal of Physics Condensed Matter
Issue number34
StatePublished - Sep 21 2009


ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics

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