Heat Driven Transport in Serial Double Quantum Dot Devices

Dorsch, Sven; Svilans, Artis; Josefsson, Martin; Goldozian, Bahareh; Kumar, Mukesh; Thelander, Claes; Wacker, Andreas; Burke, Anthony M.

doi:10.1021/acs.nanolett.0c04017

Cited by 29 publications

(32 citation statements)

References 59 publications

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“…The remaining resonances, not indicated with black arrows in figure 6(c), do not exhibit a thermocurrent polarity reversal and are thus the result of a PAT process via excited states. Further details of the origin of thermocurrent resonances in DQDs is given in [28]. Finally, we note that for heating on g4, the thermocurrent resonances are suppressed as a result of the increased background PAT signal magnitude due to the higher T ph and the absence of a clear TE effect for near symmetric heating.…”

Section: Thermocurrents In Double Quantum Dotsmentioning

confidence: 83%

“…Next, we introduce barriers to form a QD, which acts as sharp energy filter and in principle allows for highly efficient TE power conversion [1,8,9,18,19]. Further, in contrast to the barrier-free device configuration, fits to TE based thermocurrent measurements on QDs have in recent years been established as a reliable thermometry method without the need for additional device components [18,20,21,28].…”

Section: Quantum Dot Thermoelectricsmentioning

confidence: 99%

“…Experimentally, ideal energy filters are realized through quantum dots (QDs) [10][11][12][13][14][15] or single-molecular junctions [16,17] and heat engines reaching high efficiencies were demonstrated in heterostructured InAs/InP nanowire QDs [18][19][20]. Thermocurrent measurements across QD heat engines are further applicable for thermometry [21] and spectroscopy [22][23][24] purposes and the controllable level structure of coupled multi-QD systems enables the realization of three-terminal energy harvesters, where charge and heat flow are decoupled [4,[25][26][27][28].…”

Section: Introductionmentioning

confidence: 99%

“…TE devices further require a heater with a large, local heating efficiency, controlled and continuous tunability of the temperature gradient and compatibility with the QD gating technique [30]. In addition to these requirements, symmetric alignment of the heater with the QD system is important for the controlled definition of temperature gradients and a requirement for purely phonon-absorption based three-terminal energy harvesters [28]. Accurate alignment of a side-or top-heater electrode to epitaxially defined QD structures in nanowires remains, however, technically challenging.…”

Section: Introductionmentioning

confidence: 99%

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Characterization of electrostatically defined bottom-heated InAs nanowire quantum dot systems

2021

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Conversion of temperature gradients to charge currents in quantum dot systems enables probing various concepts from highly efficient energy harvesting and fundamental thermodynamics to spectroscopic possibilities complementary to conventional bias device characterization. In this work, we present a proof-of-concept study of a device architecture where bottom-gates are capacitively coupled to an InAs nanowire and double function as local joule heaters. The device design combines the ability to heat locally at different locations on the device with the electrostatic definition of various quantum dot and barrier configurations. We demonstrate the versatility of this combined gating- and heating approach by studying, as a function of the heater location and bias, the Seebeck effect across the barrier-free nanowire, fit thermocurrents through quantum dots for thermometry and detect the phonon energy using a serial double quantum dot. The results indicate symmetric heating effects when the device is heated with different gates and we present detection schemes for the electronic and phononic heat transfer contribution across the nanowire. Based on this proof-of-principle work, we propose a variety of future experiments.

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Section: Thermocurrents In Double Quantum Dotsmentioning

confidence: 83%

Section: Quantum Dot Thermoelectricsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Characterization of electrostatically defined bottom-heated InAs nanowire quantum dot systems

2021

Self Cite

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“…Alternatively, single quantum systems with multiple levels can be considered where the system-bath couplings need to be filtered. Both cases impose serious experimental limitations in situations requiring multiple baths, though some realizations of discrete-state autonomous heat engines have been achieved in three-terminal electronic setups [51][52][53][54][55] and trapped ions [56].…”

Section: Introductionmentioning

confidence: 99%

The qutrit as a heat diode and circulator

Diaz

Sánchez

2021

New J. Phys.

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We investigate the heat transport properties of a three-level system coupled to three thermal baths, assuming a model based on superconducting circuit implementations. The system-bath coupling is mediated by resonators which serve as frequency filters for the different qutrit transitions. Taking into account the finite quality factors of the resonators, we find thermal rectification and circulation effects not expected in configurations with perfectly-filtered couplings. Heat leakage in off-resonant transitions can be exploited to make the system work as an ideal diode where heat flows in the same direction between two baths irrespective of the sign of the temperature difference, as well as a perfect heat circulator whose state is phase-reversible.

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Calibration‐Free and High‐Sensitivity Microwave Detectors Based on InAs/InP Nanowire Double Quantum Dots

Cornia

Demontis

Zannier

et al. 2023

Adv Funct Materials

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At the cutting‐edge of microwave detection technology, novel approaches which exploit the interaction between microwaves and quantum devices are rising. In this study, microwaves are efficiently detected exploiting the unique transport features of InAs/InP nanowire double quantum dot‐based devices, suitably configured to allow the precise and calibration‐free measurement of the local field. Prototypical nanoscale detectors are operated both at zero and finite source‐drain bias, addressing and rationalizing the microwave impact on the charge stability diagram. The detector performance is addressed by measuring its responsivity, quantum efficiency and noise equivalent power that, upon impedance matching optimization, are estimated to reach values up to ≈2000 A W−1, 0.04 and ≈10−16normalW/Hz${10^{ - 16}}{\rm{W}}/\sqrt {Hz} $, respectively. The interaction mechanism between the microwave field and the quantum confined energy levels of the double quantum dots is unveiled and it is shown that these semiconductor nanostructures allow the direct assessment of the local intensity of the microwave field without the need for any calibration tool. Thus, the reported nanoscale devices based on III‐V nanowire heterostructures represent a novel class of calibration‐free and highly sensitive probes of microwave radiation, with nanometer‐scale spatial resolution, that may foster the development of novel high‐performance microwave circuitries.

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Heat Driven Transport in Serial Double Quantum Dot Devices

Cited by 29 publications

References 59 publications

Characterization of electrostatically defined bottom-heated InAs nanowire quantum dot systems

Characterization of electrostatically defined bottom-heated InAs nanowire quantum dot systems

The qutrit as a heat diode and circulator

Calibration‐Free and High‐Sensitivity Microwave Detectors Based on InAs/InP Nanowire Double Quantum Dots

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