Nonuniversal dynamic conductance fluctuations in disordered systems

Details Nonuniversal dynamic conductance fluctuations in disordered systems Nonuniversal dynamic conductance fluctuations in disordered systems

2009-01-23

arxiv.org/abs/0901.3668v2

Phys. Rev. B 80, 045118 (2009)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

Revised version, 6 pages, 5 figures

Scientific paper

10.1103/PhysRevB.80.045118

Sample-to-sample fluctuations of the time-dependent conductance of a system with static disorder have been studied by means of diagrammatic theory and microwave pulsed transmission measurements. The fluctuations of time-dependent conductance are not universal, i.e., depend on sample parameters, in contrast to the universal conductance fluctuations in the steady-state regime. The variance of normalized conductance, determined by the infinite-range intensity correlation C_3(t), is found to increase as a third power of delay time from an exciting pulse, t. C_3(t) grows larger than the long-range intensity correlation C_2(t) after a time t_q ~ ^{1/2} t_D (t_D being the diffusion time, being the average dimensionless conductance).

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