TY - JOUR
T1 - Transmission and scarring in graphene quantum dots
AU - Huang, Liang
AU - Lai, Ying-Cheng
AU - Ferry, David K.
AU - Akis, Richard
AU - Goodnick, Stephen
PY - 2009
Y1 - 2009
N2 - 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.
AB - 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.
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U2 - 10.1088/0953-8984/21/34/344203
DO - 10.1088/0953-8984/21/34/344203
M3 - Article
C2 - 21715778
AN - SCOPUS:70349103786
SN - 0953-8984
VL - 21
JO - Journal of Physics Condensed Matter
JF - Journal of Physics Condensed Matter
IS - 34
M1 - 344203
ER -