Experimental study of reduced shot noise in a diffusive mesoscopic conductor

Liefrink, F.; Ji, Dijkhuis; Mj, de Jong; Molenkamp, L. W.; H, van Houten

doi:10.1103/physrevb.49.14066

Cited by 88 publications

(71 citation statements)

References 14 publications

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“…These predictions were also confirmed experimentally on quantum point contacts, diffusive conductors, resonant tunneling diodes and SETs. [13][14][15][16] However, the situation if ferromagnetic junctions significantly differs from that in nonmagnetic SETs and to our best knowledge there is neither experimental nor theoretical work published up to now on shot noise in ferromagnetic SETs. As we show in this paper, large spin fluctuations, which occur in ferromagnetic junctions, have a significant influence on the shot noise, particularly at low frequencies.…”

Section: Introductionmentioning

confidence: 94%

“…In the case of nonmagnetic SETs this problem was recently extensively studied in the relevant literature. [7][8][9][10][11][12][13][14][15][16] It has been shown that the noise can provide additional information on the electronic structure, transport properties and also on electron-electron interactions. A special issue is the problem of suppression of the zero-frequency shot noise by electron correlations.…”

Section: Introductionmentioning

confidence: 99%

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Shot noise in ferromagnetic single-electron tunneling devices

et al. 1999

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Frequency dependent current noise in ferromagnetic double junctions with Coulomb blockade is studied theoretically in the limit of sequential tunneling. Two different relaxation processes are found in the correlations between spin polarized tunneling currents; low frequency spin fluctuations and high frequency charge fluctuations. Spin accumulation in strongly asymmetric junctions is shown to lead to a negative differential resistance. We also show that large spin noise activated in the range of negative differential resistance gives rise to a significant enhancement of the current noise.75.70. Pa, 73.50.Td, 73.23.Hk, 73.40.Gk

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Section: Introductionmentioning

confidence: 94%

Section: Introductionmentioning

confidence: 99%

Shot noise in ferromagnetic single-electron tunneling devices

et al. 1999

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“…Experimentally, shot noise in metallic diffusive wires was investigated by Liefrink et al [79], who observed that it is suppressed with respect to the Poisson value. The suppression factor in this experiment lies between 0.2 and 0.4 (depending on gate voltage).…”

Section: Metallic Diffusive Wiresmentioning

confidence: 99%

“…Expressions (79) and (80) are valid in the linear and non-linear regimes, provided interactions are not important. We will consider the noise in the non-linear regime in Section V, where it will be shown that effects of charging of the well may play an important role.…”

Section: Resonant Tunnel Barriersmentioning

confidence: 99%

“…The cumulants decrease exponentially with k, and thus the statistics are closer to Gaussian than to Poissonian. De Jong [344] was 79 In the sense that we can diagonalize the matrix t † t and define the transmission eigenvalues. also able to obtain the same results classically, starting from the master equation.…”

Section: B Summary For a Lazy Or Impatient Readermentioning

confidence: 99%

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Shot noise in mesoscopic conductors

2000

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Theoretical and experimental work concerned with dynamic fluctuations has developed into a very active and fascinating subfield of mesoscopic physics. We present a review of this development focusing on shot noise in small electric conductors. Shot noise is a consequence of the quantization of charge. It can be used to obtain information on a system which is not available through conductance measurements. In particular, shot noise experiments can determine the charge and statistics of the quasiparticles relevant for transport, and reveal information on the potential profile and internal energy scales of mesoscopic systems. Shot noise is generally more sensitive to the effects of electron-electron interactions than the average conductance. We present a discussion based on the conceptually transparent scattering approach and on the classical Langevin and BoltzmannLangevin methods; in addition a discussion of results which cannot be obtained by these methods is provided. We conclude the review by pointing out a number of unsolved problems and an outlook on the likely future development of the field.

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Shot noise in mesoscopic transport through localised states

Savchenko

Сафонов

Roshko

et al. 2003

Physica Status Solidi (b)

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We show that shot noise can be used for studies of hopping and resonant tunnelling between localised electron states. In hopping via several states, shot noise is seen to be suppressed compared with its classical Poisson value S I ¼ 2eI (I is the average current) and the suppression depends on the distribution of the barriers between the localised states. In resonant tunnelling through a single impurity an enhancement of shot noise is observed. It has been established, both theoretically and experimentally, that a considerable increase of noise occurs due to Coulomb interaction between two resonant tunnelling channels.

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Experimental study of reduced shot noise in a diffusive mesoscopic conductor

Cited by 88 publications

References 14 publications

Shot noise in ferromagnetic single-electron tunneling devices

Shot noise in ferromagnetic single-electron tunneling devices

Shot noise in mesoscopic conductors

Shot noise in mesoscopic transport through localised states

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