Finite frequency noise of a superconductor/ferromagnet quantum point contact

Abstract

We have calculated the finite-frequency current noise of a superconductor-ferromagnet quantum point contact (SF QPC). This signal is qualitatively affected by the spin-dependence of interfacial phase shifts (SDIPS) acquired by electrons upon reflection on the QPC. For a weakly transparent QPC, noise steps appear at frequencies or voltages determined directly by the SDIPS. These steps can occur at experimentally accessible temperatures and frequencies. Finite frequency noise is thus a promising tool to characterize the scattering properties of a SF QPC.

arXiv comment5 pages, 3 figures, revised version, to appear in Phys. Rev. Lett

References in corpus (14)

• Shot Noise in Mesoscopic Conductors
• Double Quantum Dots as Detectors of High-Frequency Quantum Noise in Mesoscopic Conductors
• Detection of Quantum Noise from an Electrically-Driven Two-Level System
• Using a quantum dot as a high-frequency shot noise detector
• Positive cross-correlations due to Dynamical Channel-Blockade in a three-terminal quantum dot
• Experimental Test of the High-Frequency Quantum Shot Noise Theory in a Quantum Point Contact
• Nanospintronics with carbon nanotubes
• Emission and absorption asymmetry in the quantum noise of a Josephson junction
• Frequency-Dependent Current Noise through Quantum-Dot Spin Valves
• Effective charges and statistical signatures in the noise of normal metal--superconductor junctions at arbitrary bias
• Conductance and current noise of a superconductor/ferromagnet quantum point contact
• Negativity of the excess noise in a quantum wire capacitively coupled to a gate
• The influence of spin-dependent phases of tunneling electrons on the conductance of a point ferromagnet/isolator/superconductor contact
• Photo-assisted Andreev reflection as a probe of quantum noise

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• Theory of superconductor-ferromagnet point contact spectra: the case of strong spin polarization
• Multiple quasiparticle Hall spectroscopy investigated with a resonant detector
• Theory of Andreev Bound States in S-F-S Junctions and S-F Proximity Devices
• Unified time-dependent perturbative relations applied to spectroscopy through photo-drag current
• Charge transfer statistics of transport through Majorana bound states
• Kondo effect and spin-active scattering in ferromagnet-superconductor junctions
• Finite frequency current noise in the Holstein model
• Thermodynamic properties of a superconductor interfaced with an altermagnet
• Light emission in delta-T-driven mesoscopic conductors
• P-wave Cooper pair splitting
• Yu-Shiba-Rusinov bands in superconductors in contact with a magnetic insulator