Spatial and energy resolution of electronic states by shot noise

Abstract

Shot noise measurements are widely used for the characterization of nonequilibrium configurations in electronic conductors. The recently introduced quantum tomography approach was implemented for the studies of electronic wavefunctions of few-electron excitations created by periodic voltage pulses in phase-coherent ballistic conductors based on the high-quality GaAs two-dimensional electron gas. Still relying on the manifestation of Fermi correlations in noise, we focus on the simpler and more general approach beneficial for the local measurements of energy distribution (ED) in electronic systems with arbitrary excitations with well-defined energies and random phases. Using biased diffusive metallic wire as a testbed, we demonstrate the power of this approach and extract the well-known double-step ED from the shot noise of a weakly coupled tunnel junction. Our experiment paves the way for the local measurements of generic nonequilibrium configurations applicable to virtually any conductor.

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• Shot Noise in Mesoscopic Systems: from Single Particles to Quantum Liquids
• Quantifying nonequlibrium thermodynamic operations in a multiterminal mesoscopic system
• Charge, spin, and heat shot noises in the absence of average currents: Conditions on bounds at zero and finite frequencies
• Does delta-$T$ noise probe quantum statistics?
• Cryogen-free scanning gate microscope for the characterization of Si/Si${}_{0.7}$Ge${}_{0.3}$ quantum devices at milli-Kelvin temperatures
• Charge-neutral nonlocal response in superconductor-InAs nanowire hybrid devices
• Heat-mode excitation in a proximity superconductor
• Electroluminescence rectification and high harmonic generation in molecular junctions
• Role of scaling dimensions in generalized noises in fractional quantum Hall tunneling due to a temperature bias
• Thermal conductance and non-equilibrium superconductivity in a diffusive NSN wire probed by shot noise
• Engineering nonequilibrium superconducting phases in a voltage-driven superconductor under an external magnetic field
• Nonequilibrium electron distribution function in a voltage-biased nanowire: A nonequilibrium Green's function approach
• Local thermometry of NbSe${}_2$ flake with delta-$T$ noise measurements
• Extrinsic thermoelectric response of coherent conductors
• Emergence of Charge-Imbalanced BCS State and Suppression of Nonequilibrium FFLO State in Asymmetric NSN Junctions