Carbon Nanotube Millikelvin Transport and Nanomechanics

Götz, K. J. G.; Schupp, Felix; Hüttel, A. K.

doi:10.1002/pssb.201800517

Cited by 4 publications

(1 citation statement)

References 42 publications

(94 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Let us stress that recent observation of real-time vibrations in CNTs 20,21 and pump-and-probe measurements 22 provide a strong motivation to scrutinize the timedependent vibron-assisted transport. Few theoretical descriptions of vibron-assisted transport properties in the presence of pumping potentials acting on the electronic system can be mentioned.…”

Section: Introductionmentioning

confidence: 99%

Quantum turnstile regime of nanoelectromechanical systems

Dragomir¹,

Moldoveanu²,

Stanciu³

et al. 2020

Phys. Rev. B

View full text Add to dashboard Cite

The effects of a turnstile operation on the current-induced vibron dynamics in nanoelectromechanical systems (NEMS) are analyzed in the framework of the generalized master equation. In our simulations each turnstile cycle allows the pumping of up to two interacting electrons across a biased mesoscopic subsystem which is electrostatically coupled to the vibrational mode of a nanoresonator. The time-dependent mean vibron number is very sensitive to the turnstile driving, rapidly increasing/decreasing along the charging/discharging sequences. This sequence of heating and cooling cycles experienced by the nanoresonator is due to specific vibron-assisted sequential tunneling processes along a turnstile period. At the end of each charging/discharging cycle the nanoresonator is described by a linear combination of vibron-dressed states sν associated to an electronic configuration ν. If the turnstile operation leads to complete electronic depletion the nanoresonator returns to its equilibrium position, i.e. its displacement vanishes. It turns out that a suitable bias applied on the NEMS leads to a slow but complete cooling at the end of the turnstile cycle. Our calculations show that the quantum turnstile regime switches the dynamics of the NEMS between vibron-dressed subspaces with different electronic occupation numbers. We predict that the turnstile control of the electron-vibron interaction induces measurable changes on the input and output transient currents.

show abstract

Section: Introductionmentioning

confidence: 99%

Quantum turnstile regime of nanoelectromechanical systems

Dragomir¹,

Moldoveanu²,

Stanciu³

et al. 2020

Phys. Rev. B

View full text Add to dashboard Cite

show abstract

Carbon-based cryoelectronics: graphene and carbon nanotube

Deng,

Kang,

Zhang

2023

Chip

View full text Add to dashboard Cite

Broken symmetries and excitation spectra of interacting electrons in partially filled Landau levels

et al. 2023

View full text Add to dashboard Cite

Interacting electrons in flat bands give rise to a variety of quantum phases. One fundamental aspect of such states is the ordering of the various flavours -such as spin or valley -that the electrons can undergo and the excitation spectrum of the broken symmetry states that they form. These properties cannot be probed directly with electrical transport measurements. The zeroth Landau level of monolayer graphene with four-fold spin-valley degeneracy is a model system for such investigations, but the nature of its broken symmetry states -particularly at partial fillings -is still not understood. Here we demonstrate a non-invasive spectroscopic technique with a scanning tunneling microscope and use it to perform measurements of the valley polarization of the electronic wavefunctions and their excitation spectrum in the partially filled zeroth Landau level of graphene. We can extract information such as the strength of Haldane pseudopotentials that characterize the repulsive interactions underlying the fractional quantum states. Our experiments also demonstrate that fractional quantum Hall phases are built upon broken symmetry states that persist at partial filling. Our experimental approach

show abstract

Carbon Nanotube Millikelvin Transport and Nanomechanics

Cited by 4 publications

References 42 publications

Quantum turnstile regime of nanoelectromechanical systems

Quantum turnstile regime of nanoelectromechanical systems

Carbon-based cryoelectronics: graphene and carbon nanotube

Broken symmetries and excitation spectra of interacting electrons in partially filled Landau levels

Contact Info

Product

Resources

About