Abstract
Here we investigate high frequency AC transport through narrow graphene nanoribbons with top-gate potentials that form a localized quantum dot. We show that as a consequence of the finite dwell time of an electron inside the quantum dot (QD), the QD behaves like a classical inductor at sufficiently high frequencies Ω ≳ 50 GHz. When the geometric capacitance of the top-gate and the quantum capacitance of the nanoribbon are accounted for, the admittance of the device behaves like a classical serial RLC circuit with resonant frequencies Ω ∼ 100900 GHz and Q-factors greater than 10 6. These results indicate that grapheme nanoribbons can serve as all-electronic ultra-high frequency oscillators and filters, thereby extending the reach of high frequency electronics into new domains.
Original language | English |
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Article number | 165203 |
Journal | Nanotechnology |
Volume | 22 |
Issue number | 16 |
DOIs | |
State | Published - 22 Apr 2011 |