Transmission and scarring in graphene quantum dots

Liang Huang, Ying-Cheng Lai, David K. Ferry, Richard Akis, Stephen M. Goodnick

Research output: Contribution to journalArticle

29 Citations (Scopus)

Abstract

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
Article number344203
Number of pages8
JournalJournal of Physics: Condensed Matter
Volume21
Issue number34
DOIs
Publication statusPublished - 26 Aug 2009

Keywords

  • resonances

Cite this

Huang, L., Lai, Y-C., Ferry, D. K., Akis, R., & Goodnick, S. M. (2009). Transmission and scarring in graphene quantum dots. Journal of Physics: Condensed Matter, 21(34), [344203]. https://doi.org/10.1088/0953-8984/21/34/344203