Observation of spectral evolution during the formation of a<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant="normal">Ni</mml:mi></mml:mrow><mml:mrow><mml:mn>2</mml:mn></mml:mrow></mml:msub></mml:mrow></mml:math>Kondo molecule

Madhavan, Vidya; Jamneala, T.; Nagaoka, Keizo; Chen, W.; Li, Je Luen; Louie, Steven G.; Crommie, Michael F.

doi:10.1103/physrevb.66.212411

Cited by 40 publications

(29 citation statements)

References 21 publications

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“…Depending on the relative weights of both conduction channels, it takes the shape of a symmetric maximum/minimum or an asymmetric peak-dip structure. [1][2][3]40 The antiresonance observed here would be compatible with a weak coupling between the tip wave function and a potential Kondo state. The occurrence of Kondo physics is related to a critical temperature T K , below which spin-flip scattering processes and the formation of the many-body electronic state are observed.…”

Section: Resultssupporting

confidence: 56%

“…[8][9][10] In addition, indirect information is obtained on the energy position of d and f states, which are usually not accessible to tunneling spectroscopy due to their high spatial localization. 3,5 The exploration of Kondo physics with the STM therefore provides a possibility to illuminate the interrelation between structural, electronic, and magnetic properties at surfaces. This paper presents a combined STM and densityfunctional theory ͑DFT͒ study of a material system that obviously deviates from the typical Kondo systems.…”

Section: Introductionmentioning

confidence: 99%

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Zero-bias conductance anomaly of a FeO-bound Au atom triggered by CO adsorption

et al. 2009

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Single gold-carbonyl species adsorbed on a FeO thin film on Pt͑111͒ exhibit a pronounced zero-bias conductance anomaly in scanning tunneling spectroscopy, while bare Au atoms reveal a smooth conductance behavior. The phenomenon is attributed to the Kondo effect, which seems to be triggered by AuCO attachment to the oxide surface but originates in fact from the interplay between the Fe magnetic moments and the Pt conduction electrons. This interpretation is supported by the observation of a similar conductance anomaly even for the pristine oxide film under certain circumstances. Apparently, the FeO/Pt͑111͒ system is intrinsically susceptible to a Kondo-type behavior, which needs however to be initiated by a small, e.g., adsorbate-induced modification of its magnetic structure. The role of the AuCO in triggering the effect is explored by analyzing the geometric and electronic properties of the ad-complex on the FeO thin film via tunneling spectroscopy and density-functional theory.

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Section: Resultssupporting

confidence: 56%

Section: Introductionmentioning

confidence: 99%

Zero-bias conductance anomaly of a FeO-bound Au atom triggered by CO adsorption

et al. 2009

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“…Scanning tunnelling spectroscopy of two magnetic atoms adsorbed on a noble metal surface found a significant change of Kondo features only for small dimer distances, for example, a few angstroms [19][20][21][22] . Attaching two magnetic atoms at the ends of a non-magnetic chain may enhance the range of the magnetic exchange interaction 23 , but structural relaxation in these nanostructures make it difficult to compare different chain lengths with each other.…”

mentioning

confidence: 99%

Interplay between the Kondo effect and the Ruderman–Kittel–Kasuya–Yosida interaction

et al. 2014

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The interplay between the Ruderman-Kittel-Kasuya-Yosida interaction and the Kondo effect is expected to provide the driving force for the emergence of many phenomena in strongly correlated electron materials. Two magnetic impurities in a metal are the smallest possible system containing all these ingredients and define a bottom-up approach towards a longterm understanding of concentrated/dense systems. Here we report on the experimental and theoretical investigation of iron dimers buried below a Cu(100) surface by means of lowtemperature scanning tunnelling spectroscopy combined with density functional theory and numerical renormalization group calculations. The Kondo effect, in particular the width of the Abrikosov-Suhl resonance, is strongly altered or even suppressed due to magnetic coupling between the impurities. It oscillates as a function of dimer separation revealing that it is related to indirect exchange interactions mediated by the conduction electrons.

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“…Additionally, STM has also been used to study the formation of Kondo molecule. [9,10] The most interesting phenomenon is so called Quantum Mirage [11,12] due to the refocus of Kondo resonance on surface.…”

Section: Introductionmentioning

confidence: 99%

Nonequilibrium STM model for Kondo resonance at a surface

Fan

2006

Phys. Rev. B

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Based on a no-equilibrium STM model, we study Kondo resonance on a surface by self-consistent calculations. The shapes of tunneling spectra are dependent on the energy range of tunneling electrons. Our results show that both energy-cutoff and energy-window of tunneling electrons have significant influence on the shapes of tunneling spectra. If no energy-cutoff is used, the Kondo resonances in tunneling spectrum are peaks with the same shapes in the density of state of absorbed magnetic atoms. This is just the prediction of Tersoff theory. If we use an energy cutoff to remove high-energy electrons, a dip structure will modulate the Kondo resonance peak in the tunneling spectrum. The real shape of Kondo peak is the mixing of the peak and dip, the so-called Fano line shape. The method of self-consistent non-equilibrium matrix Green function is discussed in details.

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Observation of spectral evolution during the formation of aNi2Kondo molecule

Cited by 40 publications

References 21 publications

Zero-bias conductance anomaly of a FeO-bound Au atom triggered by CO adsorption

Zero-bias conductance anomaly of a FeO-bound Au atom triggered by CO adsorption

Interplay between the Kondo effect and the Ruderman–Kittel–Kasuya–Yosida interaction

Nonequilibrium STM model for Kondo resonance at a surface

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