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We report Kondo-like behaviour in a quantum antidot (a submicron depleted region in a two-dimensional electron gas) in the quantum-Hall regime. When both spin branches of the lowest Landau level encircle the antidot in a magnetic field…

Mesoscale and Nanoscale Physics · Physics 2009-11-07 M. Kataoka , C. J. B. Ford , M. Y. Simmons , D. A. Ritchie

We study the Kondo effect for $\bar{D}_{s}$ and $\bar{D}_{s}^{\ast}$ mesons as impurity particles in nuclear matter. The spin-exchange interaction between the $\bar{D}_{s}$ or $\bar{D}_{s}^{\ast}$ meson and the nucleon induces the…

High Energy Physics - Phenomenology · Physics 2017-03-29 Shigehiro Yasui , Kazutaka Sudoh

We propose a simple but novel scheme to realize the Kondo effect with ultracold atoms. Our system consists of a Fermi sea of spinless fermions interacting with an impurity atom of different species which is confined by an isotropic…

Quantum Gases · Physics 2013-11-27 Yusuke Nishida

An argument is given showing that Coulomb attraction between conduction electrons and impurity ions in a dilute magnetic alloy (DMA) can be disregarded, provided the system's inverse temperature beta is replaced by an effective inverse…

Statistical Mechanics · Physics 2007-05-23 Jan Mackowiak

We study the temperature scale of the Kondo screening of a magnetic impurity which hybridizes with a two-dimensional electron gas in the presence of the Rashba spin-orbit interaction. The problem is mapped to an effective single-band…

Strongly Correlated Electrons · Physics 2012-02-24 Rok Zitko , Janez Bonca

The Comment claims the Huang et al. can be explained as a 2D Kondo effect and as such does not represent a disappearance of metallic behavior. The density dependence of the Kondo temperature is in good agreement with the data.

Strongly Correlated Electrons · Physics 2007-10-05 T. G. Castner

We discuss the physics of a of a spin-1 quantum dot, coupled to two metallic leads and develop a simple model for the temperature dependence of its conductance. Such quantum dots are described by a two-channel Kondo model with asymmetric…

Strongly Correlated Electrons · Physics 2007-08-15 Anna Posazhennikova , Babak Bayani , P. Coleman

Mesoscopic systems constitute appealing platforms to study many-body physics with light and matter degrees of freedom. The Kondo effect refers to the screening of a spin-1/2 impurity by a cloud of conduction electrons, then forming a…

Mesoscale and Nanoscale Physics · Physics 2021-09-08 Guang-Wei Deng , Loic Henriet , Da Wei , Shu-Xiao Li , Hai-Ou Li , Gang Cao , Guang-Can Guo , Marco Schiro , Karyn Le Hur , Guo-Ping Guo

We have observed the Kondo effect in strongly coupled semiconducting nanowire quantum dots. The devices are made from indium arsenide nanowires, grown by molecular beam epitaxy, and contacted by titanium leads. The device transparency can…

Mesoscale and Nanoscale Physics · Physics 2009-11-11 T. S. Jespersen , M. Aagesen , C. Soerensen , P. E. Lindelof , J. Nygaard

The nature of metal silane sigma-bond interaction has been investigated in several key systems by a range of experimental and computational techniques. The structure of [Cp'Mn(CO)2(eta2-HSiHPh2)] 1 has been determined by single crystal…

The observation of the Kondo effect in mesoscopic systems under bias$^{1,2}$ has opened a new chapter in the physics of the Kondo phenomenon. Various types of $dI/dV$, where $I$ and $V$ denote current and source-drain (s-d) bias,…

Mesoscale and Nanoscale Physics · Physics 2013-01-25 Jongbae Hong

We study an exotic Kondo effect in a system consisting of two one-dimensional XX Heisenberg ferromagnetic spin $1/2$ chains (denoted by $\alpha = u, d$ for up and down chains) coupled to a quantum dot consisting of two localized spin $1/2$…

Strongly Correlated Electrons · Physics 2024-08-09 Igor Kuzmenko , Tetyana Kuzmenko , Y. B. Band , Yshai Avishai

A spin-1/2 magnetic impurity coupled to a one-dimensional correlated electron system have been studied by applying the density renormalization group method. The Kondo temperature is substantially enhanced by strong repulsive interactions in…

Strongly Correlated Electrons · Physics 2009-10-30 Xiaoqun Wang

The two-channel Kondo lattice model is examined with a Quantum Monte Carlo simulation in the limit of infinite dimensions. We find non-fermi-liquid behavior at low temperatures including a finite low-temperature single-particle scattering…

Condensed Matter · Physics 2012-05-31 Mark Jarrell , Hanbin Pang , D. L. Cox , K. H. Luk

We investigate the many-body effects of a magnetic adatom in ferromagnetic graphene by using the numerical renormalization group method. The nontrivial band dispersion of ferromagnetic graphene gives rise to interesting Kondo physics…

Strongly Correlated Electrons · Physics 2020-06-25 Gao-Yang Li , Tie-Feng Fang , Ai-Min Guo , Qing-Feng Sun

Molecular electronics offers unique scientific and technological possibilities, resulting from both the nanometre scale of the devices and their reproducible chemical complexity. Two fundamental yet different effects, with no classical…

Mesoscale and Nanoscale Physics · Physics 2017-05-12 Andrew K. Mitchell , Kim G. L. Pedersen , Per Hedegaard , Jens Paaske

A low-temperature scanning tunneling microscope is employed to build a junction comprising a Co atom bridging a copper-coated tip and a Cu(100) surface. An Abrikosov-Suhl-Kondo resonance is evidenced in the differential conductance and its…

Mesoscale and Nanoscale Physics · Physics 2012-06-28 D-J. Choi , M. V. Rastei , P. Simon , L. Limot

We investigate the boundary phenomena that arise in a finite-size $XX$ spin chain interacting through an $XX$ interaction with a spin$-\frac{1}{2}$ impurity located at its edge. Upon Jordan-Wigner transformation, the model is described by a…

Strongly Correlated Electrons · Physics 2025-07-17 Pradip Kattel , Yicheng Tang , J. H. Pixley , Natan Andrei

Impurity four- and six-level Kondo model, in which an ion is tunneling among four- and six-stable points and interacting with surrounding conduction electrons, are investigated by using the perturbative and numerical renormalization group…

Strongly Correlated Electrons · Physics 2015-06-25 Kazumasa Hattori , Yosuke Hirayama , Kazumasa Miyake

Magnetic impurities in three-dimensional Dirac and Weyl systems are shown to exhibit a fascinatingly diverse range of Kondo physics, with distinctive experimental spectroscopic signatures. When the Fermi level is precisely at the Dirac…

Strongly Correlated Electrons · Physics 2015-09-22 Andrew K. Mitchell , Lars Fritz