Liquid-induced damping of mechanical feedback effects in single electron tunneling through a suspended carbon nanotube

Schmid, Daniel; Stiller, P. L.; Strunk, Christoph; Hüttel, A. K.

doi:10.1063/1.4931775

Cited by 16 publications

(20 citation statements)

References 30 publications

(75 reference statements)

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“…Self-driven oscillations were first observed in the electronic transport of suspended CNT transistors with high mechanical Q factors [5]. Further studies verified the mechanical nature of these transport signatures [6,7]. Similar features were recently observed in Kondo [4] and high-bias tunneling transport [8], where advanced readout techniques confirmed the large amplitude and bistability of self-driven states.…”

Section: Introductionsupporting

confidence: 70%

Self-driven oscillation in Coulomb blockaded suspended carbon nanotubes

Willick

Baugh

2020

Phys. Rev. Research

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Suspended carbon nanotubes are known to support self-driven oscillations due to electromechanical feedback under certain conditions, including low temperatures and high mechanical quality factors. Prior reports identified signatures of such oscillations in Kondo or high-bias transport regimes. Here, we observe self-driven oscillations that give rise to significant conduction in normally Coulomb blockaded low-bias transport. Using a master equation model, the self-driving is shown to result from strongly energy-dependent electron tunneling, and the dependencies of transport features on bias, gate voltage, and temperature are well reproduced.

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Section: Introductionsupporting

confidence: 70%

Self-driven oscillation in Coulomb blockaded suspended carbon nanotubes

Willick

Baugh

2020

Phys. Rev. Research

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“…The transport spectra were measured with the carbon nanotube immersed into the 3 He / 4 He mixture (D phase) of the dilution refrigerator. Its viscosity at base temperature, η ∼ 10 −5 N s/m 2 [47], is sufficiently high to mechanically dampen the transversal vibration mode [48]. As observed here, this does not affect the longitudinal mode; a likely explanation is that motion along the nanotube axis does not require any displacement of liquid.…”

Section: Discussionmentioning

confidence: 71%

Magnetic field control of the Franck-Condon coupling of few-electron quantum states

et al. 2020

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Suspended carbon nanotubes display at cryogenic temperatures a distinct interaction between the quantized longitudinal vibration of the macromolecule and its embedded quantum dot, visible via Franck-Condon conductance sidebands in transport spectroscopy. We present data on such sidebands at known absolute number N el = 1 and N el = 2 of conduction band electrons and, consequently, well-defined electronic ground and excited states in a clean nanotube device. The interaction evolves only at a finite axial magnetic field and displays a distinct magnetic-field dependence of the Franck-Condon coupling parameter, different for different electronic base states and indicating a valley dependence. Reshaping of the electronic wave function by the magnetic field is discussed as a possible cause of our observations; its impact is demonstrated in a model calculation reproducing the field-dependent coupling.

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“…This is particluarly obvious around V g = −0.03 V, −0.11 V, −0.19 V, where a clear Kondo zero bias anomaly of conductance emerges. The yellow asterisks in Figure mark characteristic lobe‐shaped features with sharp edges in the data which correspond to mechanical instability and vibrational feedback phenomena in transport …”

Section: Hole Transport Regionmentioning

confidence: 99%

Carbon Nanotube Millikelvin Transport and Nanomechanics

Götz

Schupp

Hüttel

2019

Physica Status Solidi (b)

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Single-walled carbon nanotubes cooled to cryogenic temperatures are outstanding electronic as well as nanoelectromechanical model systems. To probe a largely unperturbed system, we measure a suspended carbonnanotube device where the nanotube is grown in the last fabrication step, thus avoiding damage and residues from subsequent processing. In this ultra-clean device, we observe the transport spectrum and its interaction with nanoelectromechanics over a wide gate voltage range and thereby over a wide range of coupling parameters between the quantum dot and the contact electrodes.

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Liquid-induced damping of mechanical feedback effects in single electron tunneling through a suspended carbon nanotube

Abstract: Articles you may be interested in Dynamics of multiple viscoelastic carbon nanotube based nanocomposites with axial magnetic field

Cited by 16 publications

References 30 publications

Self-driven oscillation in Coulomb blockaded suspended carbon nanotubes

Self-driven oscillation in Coulomb blockaded suspended carbon nanotubes

Magnetic field control of the Franck-Condon coupling of few-electron quantum states

Carbon Nanotube Millikelvin Transport and Nanomechanics

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