Non-Markovian spin-resolved counting statistics and an anomalous relation between autocorrelations and cross correlations in a three-terminal quantum dot

Luo, Jun; Yan, Yiying; Huang, Yixiao; Yu, Li; He, Xiaoyong; Jiao, HuJun

doi:10.1103/physrevb.95.035154

Cited by 5 publications

(3 citation statements)

References 87 publications

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“…The Fermi liquid theory is, however, valid only for low voltages and temperatures [21,84,[86][87][88][89]. Several approximate approaches to FCS in interacting systems have been successfully employed in appropriate regimes: a noncomprehensive list includes various pertubative expansions [39,48,50,53,83,[88][89][90][91][92][93][94] and quantum master equation approaches [51,55,57,66,68,[95][96][97][98][99][100][101]. Nonperturbative numerical approaches also exist, but for models which do not capture the full complexity of interacting fermionic transport.…”

Section: Background and Motivationmentioning

confidence: 99%

Numerically exact full counting statistics of the nonequilibrium Anderson impurity model

et al. 2018

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The time dependent full counting statistics of charge transport through an interacting quantum junction is evaluated from its generating function, controllably computed with the inchworm Monte Carlo method. Exact noninteracting results are reproduced; then, we continue to explore the effect of electron-electron interactions on the time-dependent charge cumulants, first-passage time distributions and n-electron transfer distributions. We observe a crossover in the noise from Coulomb blockade-to Kondo-dominated physics as the temperature is decreased. In addition, we uncover long-tailed spin distributions in the Kondo regime and analyze queuing behavior caused by correlations between single electron transfer events. arXiv:1801.05010v1 [cond-mat.mes-hall]

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Section: Background and Motivationmentioning

confidence: 99%

Numerically exact full counting statistics of the nonequilibrium Anderson impurity model

et al. 2018

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“…2(b). A so-called dynamical spin blockade mechanism develops [56][57][58][59][60], which leads eventually to a strong suppression of the current. An increase in spin tunneling asymmetry results in an overall inhibition of both spin-up and spin-down currents.…”

Section: Gqme and Spin Dynamicsmentioning

confidence: 99%

Stochastic thermodynamics of an electron spin resonance quantum dot system

et al. 2020

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We present a stochastic thermodynamics analysis of an electron-spin-resonance pumped quantum dot device in the Coulomb-blocked regime, where a pure spin current is generated without an accompanying net charge current. Based on a generalized quantum master equation beyond secular approximation, quantum coherences are accounted for in terms of an effective average spin in the Floquet basis. Elegantly, this effective spin undergoes a precession about an effective magnetic field, which originates from the non-secular treatment and energy renormalization. It is shown that the interaction between effective spin and effective magnetic field may have the dominant roles to play in both energy transport and irreversible entropy production. In the stationary limit, the energy and entropy balance relations are also established based on the theory of counting statistics.PACS numbers:

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“…It is able to provide additional information about the spin dynamics and spin transfer processes, different from their charge behaviors. Recent studies have shown that the spin current noise could be generated even in the absence of a net charge current [63,64]. Furthermore, spin current fluctuations are predicted to be able to sensitively explore the effect of spin-flip scattering [65][66][67][68][69], and intriguingly probe repulsive or attractive interactions in QD transport systems [70,71].…”

Section: Introductionmentioning

confidence: 99%

Spin-resolved counting statistics as a sensitive probe of spin correlation in transport through a quantum dot spin valve

Hu,

Wang

et al. 2024

J. Phys.: Condens. Matter

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We investigate the noise in spin transport through a single quantum dot (QD) tunnel coupled to ferromagnetic electrodes with noncollinear magnetizations. Based on a spin-resolved quantum master equation, auto- and cross-correlations of spin-resolved currents are analyzed to reveal the underlying spin transport dynamics and characteristics for various polarizations. We find the currents of majority and minority spins could be strongly autocorrelated despite uncorrelated charge trans fer. The interplay between tunnel coupling and the Coulomb interaction gives rise to an exchange magnetic field, leading to the precession of the accumulated spin in the QD. It strongly suppresses the bunching of spin tunneling events and results in a unique double-peak structure in the noise ofthe net spin current. The spin autocorrelation is found to be susceptible to magnetization alignments, which may serve as a sensitive tool to measure the magnetization directions between the ferromagnetic electrodes.

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Non-Markovian spin-resolved counting statistics and an anomalous relation between autocorrelations and cross correlations in a three-terminal quantum dot

Cited by 5 publications

References 87 publications

Numerically exact full counting statistics of the nonequilibrium Anderson impurity model

Numerically exact full counting statistics of the nonequilibrium Anderson impurity model

Stochastic thermodynamics of an electron spin resonance quantum dot system

Spin-resolved counting statistics as a sensitive probe of spin correlation in transport through a quantum dot spin valve

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