Long-Range Coulomb Interaction and the Crossover between Quantum and Shot Noise in Diffusive Conductors

Details Long-Range Coulomb Interaction and the Crossover between Quantum and Shot Noise in Diffusive Conductors Long-Range Coulomb Interaction and the Crossover between Quantum and Shot Noise in Diffusive Conductors

1999-08-13

arxiv.org/abs/cond-mat/9908193v2

Phys. Rev. B 62, 5066 (2000)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

13 pages, RevTex, 7 ps figures, more details of derivation given

Scientific paper

10.1103/PhysRevB.62.5066

Frequency-dependent nonequilibrium noise in quantum-coherent diffusive conductors is calculated with account taken of long-range Coulomb interaction. For long and narrow contacts with strong external screening the crossover between quantum and shot noise takes place at frequencies much smaller than the voltage drop across the contact. We also show that under certain frequency limitations, the semiclassical and quantum-coherent approaches to shot noise are mathematically equivalent.

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