scholarly journals Two-channel Kondo physics in odd impurity chains

2011 ◽  
Vol 84 (3) ◽  
Author(s):  
Andrew K. Mitchell ◽  
David E. Logan ◽  
H. R. Krishnamurthy
Keyword(s):  
Kondo Physics

New Aspects of Quasi-Kondo Physics: Two-Level Kondo and Strongly Coupled Local Electron–Phonon Systems

2005 ◽  
Vol 74 (1) ◽  
pp. 49-58 ◽  
Author(s):  
Satoshi Yotsuhashi ◽  
Masatsugu Kojima ◽  
Hiroaki Kusunose ◽  
Kazumasa Miyake
Keyword(s):  
Local Electron ◽  
Strongly Coupled ◽  
Kondo Physics

scholarly journals Kondo Physics in a Rare Earth Ion with Well Localized4fElectrons

2012 ◽  
Vol 108 (25) ◽  
Author(s):  
Jolanta Stankiewicz ◽  
Marco Evangelisti ◽  
Zachary Fisk ◽  
Pedro Schlottmann ◽  
Lev P. Gor’kov
Keyword(s):  
Rare Earth ◽  
Rare Earth Ion ◽  
Kondo Physics

Nonequilibrium Density of State of a Kondo Dot Coupled to Luttinger Liquid

2012 ◽  
Vol 622-623 ◽  
pp. 1826-1829
Author(s):  
Kai Hua Yang ◽  
Yang Chen ◽  
Bei Yun Liu ◽  
Xian He
Keyword(s):  
Density Of States ◽  
Bias Voltage ◽  
Strong Interaction ◽  
Luttinger Liquid ◽  
Equation Of Motion ◽  
Green Functions ◽  
Zero Temperature ◽  
Density Of State ◽  
Weakly Coupled ◽  
Kondo Physics

We theoretically investigate the nonequilibrium density of states (DOS) of a Kondo dot weakly coupled to Luttinger liquid leads by using the equation-of-motion technique of non-equilibrium Green functions. The joint effects of large bias voltage and moderately strong intralead interactions results in nontrivial modifications of the Kondo peak in the DOS. The DOS exhibits a two-channel Kondo physics for moderately strong interaction in the leads at zero temperature.

scholarly journals Oxygen vacancy-driven orbital multichannel Kondo effect in Dirac nodal line metals IrO2 and RuO2

2020 ◽  
Vol 11 (1) ◽  
Author(s):  
Sheng-Shiuan Yeh ◽  
Ta-Kang Su ◽  
An-Shao Lien ◽  
Farzaneh Zamani ◽  
Johann Kroha ◽  
...  
Keyword(s):  
Kondo Effect ◽  
High Temperature Superconductivity ◽  
Topological States Of Matter ◽  
Nodal Line ◽  
Metallic State ◽  
Strong Electron ◽  
Quantum Matter ◽  
Kondo Physics ◽  
Topological States ◽  
Weak Coupling Theory

Abstract Strong electron correlations have long been recognized as driving the emergence of novel phases of matter. A well recognized example is high-temperature superconductivity which cannot be understood in terms of the standard weak-coupling theory. The exotic properties that accompany the formation of the two-channel Kondo (2CK) effect, including the emergence of an unconventional metallic state in the low-energy limit, also originate from strong electron interactions. Despite its paradigmatic role for the formation of non-standard metal behavior, the stringent conditions required for its emergence have made the observation of the nonmagnetic, orbital 2CK effect in real quantum materials difficult, if not impossible. We report the observation of orbital one- and two-channel Kondo physics in the symmetry-enforced Dirac nodal line (DNL) metals IrO2 and RuO2 nanowires and show that the symmetries that enforce the existence of DNLs also promote the formation of nonmagnetic Kondo correlations. Rutile oxide nanostructures thus form a versatile quantum matter platform to engineer and explore intrinsic, interacting topological states of matter.

scholarly journals Charge localization and reentrant superconductivity in a quasi-ballistic InAs nanowire coupled to superconductors

2019 ◽  
Vol 5 (7) ◽  
pp. eaav1235 ◽  
Author(s):  
J. C. Estrada Saldaña ◽  
R. Žitko ◽  
J. P. Cleuziou ◽  
E. J. H. Lee ◽  
V. Zannier ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Coulomb Blockade ◽  
Edge States ◽  
Semiconductor Nanowire ◽  
Charge Localization ◽  
Reentrant Superconductivity ◽  
Kondo Physics ◽  
Relevant Role ◽  
The One

A semiconductor nanowire with strong spin-orbit coupling in proximity to a superconductor is predicted to display Majorana edge states emerging under a properly oriented magnetic field. The experimental investigation of these exotic states requires assessing the one-dimensional (1D) character of the nanowire and understanding the superconducting proximity effect in the presence of a magnetic field. Here, we explore the quasi-ballistic 1D transport regime of an InAs nanowire with Ta contacts. Fine-tuned by means of local gates, the observed plateaus of approximately quantized conductance hide the presence of a localized electron, giving rise to a lurking Coulomb blockade effect and Kondo physics. When Ta becomes superconducting, this local charge causes an unusual, reentrant magnetic field dependence of the supercurrent, which we ascribe to a 0 - π transition. Our results underline the relevant role of unintentional charge localization in the few-channel regime where helical subbands and Majorana quasi-particles are expected to arise.

Possible Kondo Physics near a Metal-Insulator Crossover in theA-Site Ordered PerovskiteCaCu3Ir4O12

2013 ◽  
Vol 111 (17) ◽  
Author(s):  
J.-G. Cheng ◽  
J.-S. Zhou ◽  
Y.-F Yang ◽  
H. D. Zhou ◽  
K. Matsubayashi ◽  
...  
Keyword(s):  
Metal Insulator ◽  
Kondo Physics
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