Sub-Kelvin transport spectroscopy of fullerene peapod quantum dots

Utko, Pawel; Nygård, Jesper; Monthioux, Marc; Noé, Laure

doi:10.1063/1.2403909

Cited by 31 publications

(40 citation statements)

References 25 publications

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“…These findings are consistent with recent transport experiments on nanotubes with encapsulated C 60 molecules [15,16] as well as with recent density functional theory calculations of spin interactions of chains of Sc@C 82 inside carbon nanotubes…”

Section: Nanotube Devicessupporting

confidence: 80%

Pauli spin blockade in carbon nanotube double quantum dots

et al. 2008

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We report Pauli spin blockade in an impurity defined carbon nanotube double quantum dot. We observe a pronounced current suppression for negative source-drain bias voltages which is investigated for both symmetric and asymmetric coupling of the quantum dots to the leads. The measured differential conductance agrees well with a theoretical model of a double quantum dot system in the spin-blockade regime which allows us to estimate the occupation probabilities of the relevant singlet and triplet states. This work shows that effective spin-to-charge conversion in nanotube quantum dots is feasible and opens the possibility of single-spin readout in a material that is not limited by hyperfine interaction with nuclear spins.

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Section: Nanotube Devicessupporting

confidence: 80%

Pauli spin blockade in carbon nanotube double quantum dots

et al. 2008

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“…However, it has been reported that metal particles formed during electromigration may be left in the gap, giving spurious signatures of Coulomb Blockade (CB) and Kondo physics, which are not related to the objects deposited onto the device [10][11][12][13]. A completely different system, in which difficulties in the understanding of transport data may occur, is a fullerene peapod; in this case it is not clear if the irregular structure of Coulomb diamonds is due to the encapsulated fullerene molecules or to defects or impurities in the nanotube [14].…”

Section: Introductionmentioning

confidence: 99%

Three-terminal electric transport measurements on gold nano-particles combined withex situTEM inspection

Gao¹,

Osorio²,

Gaven³

et al. 2009

Nanotechnology

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We have fabricated nanometer-spaced electrodes on electron-transparent silicon nitride membranes. A thin Cr/Au layer is evaporated on the backside of the membrane which serves as a gate electrode. Using these devices, we have performed three-terminal electron transport measurements on gold nano-particles at liquid helium temperature. Coulomb Blockade features have been observed and the capacitance to the gate has been extracted. After transport measurements, the Cr/Au back gate is removed and the devices are inspected with a transmission-electron microscope (TEM). TEM inspection reveals the presence of a few nano-particles in the nanogap, which is in agreement with the transport measurements. In addition, the nano-particle size as observed by TEM coincides with the one estimated from the gate capacitance value.

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“…Theoretical investigations predict pronounced changes in the electronic band structure of the nanotube [5], which is supported by the scanning tunneling microscopy [6] and photoluminescence [7] experiments. On the other hand, no fundamental perturbation in the electron system has been found in the photoemission [8] and electron transport [9] studies on peapods.…”

Section: Introductionmentioning

confidence: 99%

Coupling between Electronic and Vibrational Excitations in Carbon Nanotubes Filled with C₆₀Fullerenes

et al. 2011

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We investigate the low-temperature electron transport through C 60 peapods, which are carbon nanotubes encapsulating C 60 fullerenes. We find that the temperature dependence of the Coulomb blockade oscillations in peapod quantum dots deviates from conventional Breit-Wigner behavior, showing signatures of the Franck-Condon blockade of conductance. This indicates the presence of a coupling between electronic states and vibrational excitations. Unlike for suspended empty nanotubes, these are not intrinsic vibrational modes of the tube but mechanical vibrations of the encapsulated fullerenes that affect the electronic transport. Fullerene peapods thus emerge as a new class of nanoelectromechanical systems.

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Sub-Kelvin transport spectroscopy of fullerene peapod quantum dots

Abstract: Articles you may be interested inInfluence of electron-phonon interaction on the thermoelectric properties of a serially coupled double quantum dot system

Cited by 31 publications

References 25 publications

Pauli spin blockade in carbon nanotube double quantum dots

Pauli spin blockade in carbon nanotube double quantum dots

Three-terminal electric transport measurements on gold nano-particles combined withex situTEM inspection

Coupling between Electronic and Vibrational Excitations in Carbon Nanotubes Filled with C₆₀Fullerenes

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Sub-Kelvin transport spectroscopy of fullerene peapod quantum dots

Abstract: Articles you may be interested inInfluence of electron-phonon interaction on the thermoelectric properties of a serially coupled double quantum dot system

Cited by 31 publications

References 25 publications

Pauli spin blockade in carbon nanotube double quantum dots

Pauli spin blockade in carbon nanotube double quantum dots

Three-terminal electric transport measurements on gold nano-particles combined withex situTEM inspection

Coupling between Electronic and Vibrational Excitations in Carbon Nanotubes Filled with C60Fullerenes

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Product

Resources

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Coupling between Electronic and Vibrational Excitations in Carbon Nanotubes Filled with C₆₀Fullerenes