The Kondo Effect in the Unitary Limit

Wiel, Wilfred G. van der; Franceschi, S. De; Fujisawa, Toshimasa; Elzerman, J. M.; Tarucha, Seigo; Kouwenhoven, Leo P.

doi:10.1126/science.289.5487.2105

Cited by 763 publications

(770 citation statements)

References 21 publications

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“…This dependence is drawn in figure 3.5(c) and the characteristic features include a conductance that increases logarithmically with decreasing temperature and saturates at a value 2e 2 / h at the lowest temperatures in the case of symmetric lead-dot coupling. The latter is commonly referred to as Kondo in the unitary limit [48]. In a magnetic field the Zeeman splitting of the Kondo resonance leads to the observation of two Kondo peaks symmetric in bias, separated by twice the Zeeman energy as schematically illustrated in figure 3.6(a).…”

Section: Intermediate Coupling: Cotunneling and Kondo Effectmentioning

confidence: 99%

Single-molecule transport in three-terminal devices

Osorio

Bjørnholm

Lehn

et al. 2008

J. Phys.: Condens. Matter

103

114

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Transport through single molecules has been studied using different test beds. In this paper we focus on three-terminal devices in which a molecule bridges the gap between two gold electrodes and a third electrode-the gate-is able to modulate the conduction properties of the junction. Depending on the electronic coupling, , between the molecule and the gold electrodes, different transport regimes can be distinguished. We show measurements on junctions incorporating different single-molecule systems which demonstrate the distinction between these regimes, as well as the experimental limitations in controlling the exact value of .

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Section: Intermediate Coupling: Cotunneling and Kondo Effectmentioning

confidence: 99%

Single-molecule transport in three-terminal devices

Osorio

Bjørnholm

Lehn

et al. 2008

J. Phys.: Condens. Matter

103

114

View full text Add to dashboard Cite

show abstract

“…The Kondo resonance has been investigated through scanning tunneling microscopy (STM) in single atoms either isolated [2][3][4] or coupled to other atoms, [5][6][7][8] in single-atom contacts, [9][10][11] and in single molecules. [12][13][14][15][16] It has also been successfully evidenced in nanoscale devices, [17][18][19][20][21] in particular quantum dots, [17][18][19][22][23][24] carbon nanotubes, [25][26][27] and nanowires. 28 Of particular interest-especially in the context of spintronics, is the issue of screening in the presence of a magnetic environment such as spin-polarized electrodes [29][30][31][32][33][34][35] and spinpolarized edge states.…”

Section: Introductionmentioning

confidence: 99%

Nonequilibrium spin-current detection with a single Kondo impurity

et al. 2013

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We present a theoretical study based on the Anderson model of the transport properties of a Kondo impurity (atom or quantum dot) connected to ferromagnetic leads, which can sustain a nonequilibrium spin current. We analyze the case where the spin current is injected by an external source and when it is generated by the voltage bias. Due to the presence of ferromagnetic contacts, a static exchange field is produced that eventually destroys the Kondo correlations. We find that such a field can be compensated by an appropriated combination of the spin-dependent chemical potentials leading to the restoration of the Kondo resonance. In this respect, a Kondo impurity may be regarded as a very sensitive sensor for nonequilibrium spin phenomena.

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“…The relevance of electron-electron interactions in QD systems results from the strong confinement of the electrons due to the reduced sizes of typical structures. [9][10][11] This interaction is responsible for several fascinating phenomena, e.g., Coulomb blockade, 11,12 and Kondo effect, 7,13,14 leading to characteristic behavior of the thermodynamical and transport properties, which depend drastically on the number of QDs, as well as on their topological configuration in the structure. In recent years, strong on-site interaction in double 13,[15][16][17][18][19][20][21][22][23][24] and triple [25][26][27][28][29][30][31][32] QD (DQD and TQD) structures have received a great deal of attention when in the Kondo regime.…”

Section: Introductionmentioning

confidence: 99%

Capacitively coupled double quantum dot system in the Kondo regime

et al. 2011

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A detailed study of the low-temperature physics of an interacting double quantum dot system in a T-shape configuration is presented. Each quantum dot is modeled by a single Anderson impurity and we include an inter-dot electron-electron interaction to account for capacitive coupling that may arise due to the proximity of the quantum dots. By employing a numerical renormalization group approach to a multi-impurity Anderson model, we study the thermodynamical and transport properties of the system in and out of the Kondo regime. We find that the two-stage-Kondo effect reported in previous works is drastically affected by the inter-dot Coulomb repulsion. In particular, we find that the Kondo temperature for the second stage of the two-stage-Kondo effect increases exponentially with the inter-dot Coulomb repulsion, providing a possible path for its experimental observation.

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The Kondo Effect in the Unitary Limit

Cited by 763 publications

References 21 publications

Single-molecule transport in three-terminal devices

Single-molecule transport in three-terminal devices

Nonequilibrium spin-current detection with a single Kondo impurity

Capacitively coupled double quantum dot system in the Kondo regime

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