Andreev current for low temperature thermometry

Faivre, T.; Golubev, Dmitry S.; Pekola, Jukka P.

doi:10.1063/1.4919892

Cited by 11 publications

(6 citation statements)

References 22 publications

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“…But at low voltages there is a qualitative difference -the differential conductivity according to formula (4) changes linearly, which corresponds to experiment [17,18]. Equation ( 5) is similar to the calculation of Andreev current in [19]. Similar features were observed in [20].…”

Section: W II Experimentalsupporting

confidence: 61%

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Electron-Phonon Interaction in Aluminum SINIS

Lemzyakov¹,

Tarasov

Édelman³

2022

IEEE Trans. Appl. Supercond.

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A detailed analysis of power flow in superconductorinsulator-normal metal-insulator-superconductor (SINIS) structures with aluminum superconducting electrodes and normal metal absorber made of aluminum with suppressed superconductivity is carried out. From a comparison with the experimental results of measuring the current-voltage characteristics at temperatures from 0.087 K to 0.3 K, it was concluded that the power of the electron-phonon interaction is proportional to the difference of sixth powers of the electron and phonon temperatures. The previously applied relation with the difference of fifth powers leads to an almost twofold error in determining the power of the electron-phonon interaction and an estimate of the electron temperature that is underestimated by about 40 mK.

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Section: W II Experimentalsupporting

confidence: 61%

“…In these formulas, γ is the coefficient chosen for better matching of the I-V characteristic with the calculated current, while selecting Te in formula (3) [19,20]. At V/VΔ<0.3 obtained Te values slightly differ, which does not affect the results.…”

Section: W II Experimentalmentioning

confidence: 99%

Electron-Phonon Interaction in Aluminum SINIS

Lemzyakov¹,

Tarasov

Édelman³

2022

IEEE Trans. Appl. Supercond.

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“…The possible applications of superconductor-ferromagnetic structures for thermoelectrics has been also highlighted in a recent review article. 11 In the present work we theoretically analyze charge and thermoelectric transport in a prototype structure based on the FIS building block, and explore its application as an ultra-sensitive electron thermometer [12][13][14][15][16][17][18][19] and, eventually as a temperature-to-frequency converter. Our system consists of a normal metal-ferromagnetic insulator-superconductor (NFIS) junction, denoted here as the thermoelectric element (TE), which is connected, via the superconducting wires S 1 , to a generic load element, as shown in Fig.…”

Section: Introductionmentioning

confidence: 99%

Ferromagnetic-Insulator-Based Superconducting Junctions as Sensitive Electron Thermometers

et al. 2015

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We present an exhaustive theoretical analysis of charge and thermoelectric transport in a normal metal-ferromagnetic insulator-superconductor (NFIS) junction, and explore the possibility of its use as a sensitive thermometer. We investigated the transfer functions and the intrinsic noise performance for different measurement configurations. A common feature of all configurations is that the best temperature noise performance is obtained in the non-linear temperature regime for a structure based on an europium chalcogenide ferromagnetic insulator in contact with a superconducting Al film structure. For an open-circuit configuration, although the maximal intrinsic temperature sensitivity can achieve 10nKHz −1/2 , a realistic amplifying chain will reduce the sensitivity up to 10µKHz −1/2 . To overcome this limitation we propose a measurement scheme in a closedcircuit configuration based on state-of-art SQUID detection technology in an inductive setup. In such a case we show that temperature noise can be as low as 35nK Hz −1/2 . We also discuss a temperature-to-frequency converter where the obtained thermo-voltage developed over a Josephson junction operated in the dissipative regime is converted into a high-frequency signal. We predict that the structure can generate frequencies up to ∼ 120GHz, and transfer functions up to 200GHz/K at around ∼ 1K. If operated as electron thermometer, the device may provide temperature noise lower than 35nK Hz −1/2 thereby being potentially attractive for radiation sensing applications.

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“…in prototypes of nanoscopic refrigerators [29]. This subgap Andreev current enables construction of nanoscopic thermometers that do not produce any self-heating [30]. In more complex three-terminal hybrid devices (consisting of two metallic electrodes and one superconducting lead) the subgap transport allows separation of charge from heat currents [31], production of spatially entangled (de-paired) electrons [32,33], realization of exotic Majorana or Weyl quasiparticles, and many other interesting phenomena.…”

Section: Introductionmentioning

confidence: 99%

Enhancements of the Andreev conductance due to emission/absorption of bosonic quanta

Barański

Domański

2015

J. Phys.: Condens. Matter

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We analyze the subgap spectrum and transport properties of the quantum dot embedded between one superconducting and another metallic reservoirs and additionally coupled to an external boson mode. Emission/absorption of the bosonic quanta induces a series of the subgap Andreev states, that eventually interfere with each other. We discuss their signatures in the differential conductance both, for the linear and nonlinear regimes.

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Andreev current for low temperature thermometry

Cited by 11 publications

References 22 publications

Electron-Phonon Interaction in Aluminum SINIS

Electron-Phonon Interaction in Aluminum SINIS

Ferromagnetic-Insulator-Based Superconducting Junctions as Sensitive Electron Thermometers

Enhancements of the Andreev conductance due to emission/absorption of bosonic quanta

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