Frequency-Dependent Shot Noise in Long Disordered Superconductor–Normal-Metal–Superconductor Contacts

Nagaev, K. É.

doi:10.1103/physrevlett.86.3112

Cited by 24 publications

(42 citation statements)

References 16 publications

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“…This expression is exactly the prediction of semiclassical theory in the zero temperature limit and when no inelastic processes take place [18,19]. In our junctions however, proximity effect corrections persist over the whole voltage range.…”

Section: Noise In S/n/s Diffusive Hybrid Superconducting Nanostructuressupporting

confidence: 54%

“…Here, dissipation arises from electron-electron interactions that necessarily occur at low voltage due to the large number of Andreev reflections needed for the quasiparticles to escape into the superconducting electrodes. In both cases, we conclude that, at very low voltage and 'high' temperature, the current noise in long S/N/S junctions is governed by the transport of incoherent quasiparticles between the two superconducting reservoirs, which induces a noise divergence when the voltage goes to zero [18].…”

Section: Noise In S/n/s Diffusive Hybrid Superconducting Nanostructuresmentioning

confidence: 99%

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Hybrid superconducting nanostructures: very low temperature local probing and noise

Chapelier¹,

Lefloch²,

Courtois³

et al. 2010

IJNT

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Abstract:We review the topic of hybrid superconducting nanostructures by introducing the basic physical concepts and describing recent key experimental results. We discuss the superconductivity nucleation in mesoscopic structures, the vortex lattice imaging in doped diamond films, the superconducting proximity effect, multiple Andreev reflection in Josephson junctions and the electronic micro-cooling in hybrid tunnel junctions. An emphasis is put on very low temperature local probes and noise measurement techniques developed in Grenoble.

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Section: Noise In S/n/s Diffusive Hybrid Superconducting Nanostructuressupporting

confidence: 54%

Section: Noise In S/n/s Diffusive Hybrid Superconducting Nanostructuresmentioning

confidence: 99%

Hybrid superconducting nanostructures: very low temperature local probing and noise

Chapelier¹,

Lefloch²,

Courtois³

et al. 2010

IJNT

View full text Add to dashboard Cite

show abstract

“…As the result, the depth of the Andreev band in our long-arm geometry, δ E ∼ ∆W 4/5 in Eq. (23), considerably exceeds the depth ∼ ∆Γ of the Andreev level in a point contact with comparable transparency.…”

Section: Discussionmentioning

confidence: 91%

Nonequilibrium effects in tunnel Josephson junctions

et al. 2005

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We study nonequilibrium effects in current transport through voltage biased tunnel junction with long diffusive superconducting leads at low applied voltage, eV ≪ 2∆, and finite temperatures. Due to a small value of the Josephson frequency, the quasiparticle spectrum adiabatically follows the time evolution of the superconducting phase difference, which results in the formation of oscillating bound states in the vicinity of the tunnel junction (Andreev band). The quasiparticles trapped by the Andreev band generate higher even harmonics of the Josephson ac current, and also, in the presence of inelastic scattering, a nonequilibrium dc current, which may considerably exceed the dc quasiparticle current given by the tunnel model. The distribution of travelling quasiparticles also deviates from the equilibrium due to the spectrum oscillations, which results in an additional contribution to the dc current, proportional to √ V .

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“…The electronic transport then occurs by incoherent MAR, which induce excess noise as compared to a similar N-N-N system. The experimentally measured shot noise [8,9] can be described in the framework of the semiclassical theory [5,6,7].…”

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confidence: 99%

Divergence at Low Bias and Down-Mixing of the Current Noise in a Diffusive Superconductor–Normal-Metal–Superconductor Junction

et al. 2007

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We present current noise measurements in a long diffusive superconductor -normal metal -superconductor junction in the low voltage regime, in which transport can be partially described in terms of coherent multiple Andreev reflections. We show that, when decreasing voltage, the current noise exhibits a strong divergence together with a broad peak. We ascribe this peak to the mixing between the ac-Josephson current and the noise of the junction itself. We show that the junction noise corresponds to the thermal noise of a non-linear resistor 4kBT /R with R = V /I(V ) and no adjustable parameters.

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Frequency-Dependent Shot Noise in Long Disordered Superconductor–Normal-Metal–Superconductor Contacts

Cited by 24 publications

References 16 publications

Hybrid superconducting nanostructures: very low temperature local probing and noise

Hybrid superconducting nanostructures: very low temperature local probing and noise

Nonequilibrium effects in tunnel Josephson junctions

Divergence at Low Bias and Down-Mixing of the Current Noise in a Diffusive Superconductor–Normal-Metal–Superconductor Junction

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