Noise Thermal Impedance of a Diffusive Wire
arXiv:cond-mat/0501397 · doi:10.1103/PhysRevLett.95.066602
Abstract
The current noise density S of a conductor in equilibrium, the Johnson noise, is determined by its temperature T: S=4kTG with G the conductance. The sample's noise temperature Tn=S/(4kG) generalizes T for a system out of equilibrium. We introduce the "noise thermal impedance" of a sample as the amplitude of the oscillation of Tn when heated by an oscillating power. For a macroscopic sample, it is the usual thermal impedance. We show for a diffusive wire how this (complex) frequency-dependent quantity gives access to the electron-phonon interaction time in a long wire and to the diffusion time in a shorter one, and how its real part may also give access to the electron-electron inelastic time. These times are not simply accessible from the frequency dependence of S itself.
4 pages, 2 figures
References in corpus (8)
- Shot Noise in Mesoscopic Conductors
- Environmental effects in the third moment of voltage fluctuations in a tunnel junction
- Scattering Theory of Photon-Assisted Electron Transport
- Noise in an ac biased junction. Non-stationary Aharonov-Bohm effect
- Temperature dependent third cumulant of tunneling noise
- Frequency Scales for Current Statistics of Mesoscopic Conductors
- Frequency dependent third cumulant of current in diffusive conductors
- Structured Energy Distribution and Coherent AC Transport in Mesoscopic Wires
Cited by in corpus (10)
- Dynamics of Quantum Noise in a Tunnel Junction under ac Excitation
- Inelastic Interaction Corrections and Universal Relations for Full Counting Statistics
- Finite frequency quantum noise in an interacting mesoscopic conductor
- Shot noise of photon-excited electron-hole pairs in open quantum dots
- Magnetic field effects on the finite-frequency noise and ac conductance of a Kondo quantum dot out of equilibrium
- Direct measurement of the electron energy relaxation dynamics in metallic wires
- Charge fluctuations in open chaotic cavities
- Frequency dispersion of photon-assisted shot noise in mesoscopic conductors
- Fundamental and Environmental Contributions to the Cyclostationary Third Moment of Current Fluctuations in a Tunnel Junction
- Slow electron-phonon relaxation controls the dynamics of the superconducting resistive transition