Potential Energy Driven Spin Manipulation via a Controllable Hydrogen Ligand

Jacobson, Peter; Muenks, Matthias; Laskin, Gennadii; Brovko, Oleg O.; Stepanyuk, V. S.; Ternes, Markus; Kern, Klaus

doi:10.48550/arxiv.1609.00612

Cited by 2 publications

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“…With these experiments in mind we should mention how the predicted Kondo dissipation per cycle compares with the sensitivity of these systems. The most recent "pendulum AFM" 2 realized with tips of Q-factor 4.810 5 , vibrating with frequency near 5 KHz, force constant k ∼ 0.03N/m and amplitude A ∼ 5nm can reach the extreme sensitivity πkA 2 ∼ 10 −5 eV/cycle. Our calculated Kondo dissipation, Figs.…”

Section: Discussionmentioning

confidence: 99%

“…The exquisite sensitivity of these systems permits the study of physical phenomena, in particular of phase transitions, down to the nanoscale. [1][2][3][4][5] Tip-induced internal transitions in quantum dots have been known to cause sharp dissipation peaks. 6 The injection by pendulum AFM of 2π slips in the surface phase of a chargedensity-wave, an event akin to a local first order classical phase transition, is also marked by dissipation peaks.…”

Section: Introductionmentioning

confidence: 99%

“…The Kondo effect 7,8 -the many-body correlated state of a magnetic impurity -is commonly probed on metallic surfaces by STM tips, where it gives rise to a prominent zero-bias anomaly. 1,5,9,10 . Thus far, these two phenomena, nanomechanical dissipation peaks on one hand, and the onset or demise of Kondo screening on the other hand -itself a many-body quantum phase transitionhave not been connected.…”

Section: Introductionmentioning

confidence: 99%

“…Yet, experimentally the onset and offset of a Kondo state, has been mechanically triggered in several instances. Recent data 5,[11][12][13][14][15][16] show that it is possible to selectively switch on and off the Kondo effect via atomic manipulation, a switching detected through the appearance and disappearance of a zero bias STM conductance anomaly. As a typical example, a surface impurity may be switched by a tip action from a spin 1/2 state, which is Kondo screened, to a S = 1 or a S = 0 state where the Kondo effect disappears-see Fig.…”

Section: Introductionmentioning

confidence: 99%

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Nanomechanical dissipation at a tip-induced Kondo onset

2017

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The onset or demise of Kondo effect in a magnetic impurity on a metal surface can be triggered, as sometimes observed, by the simple mechanical nudging of a tip. Such a mechanically-driven quantum phase transition must reflect in a corresponding mechanical dissipation peak; yet, this kind of signature has not been focused upon so far. Aiming at the simplest theoretical modelling, we treat the impurity as an Anderson impurity model, the tip action as a hybridization switching, and solve the problem by numerical renormalization group. Studying this model as function of temperature and magnetic field we are able to isolate the Kondo contribution to dissipation. While that is, reasonably, of the order of the Kondo energy, its temperature evolution shows a surprisingly large tail even above the Kondo temperature. The detectability of Kondo mechanical dissipation in atomic force microscopy is also discussed. arXiv:1703.06057v2 [cond-mat.str-el]

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Nanomechanical dissipation at a tip-induced Kondo onset

2017

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“…For adatoms on surfaces, a low coordination number and changes in hybridization can lead to a dramatic enhancement of magnetic anisotropy [57,58,59,60] which have been shown to reach values of up to ≈ 60 meV for Co adatoms on MgO [60]. Additionally, different surface adsorption sites or the bonding to hydrogen alter the magnetic anisotropy or even the total spin of the adatoms [61,62,63,44,64,65]. Furthermore, the exchange interaction with the substrate can affect the observed magnetic anisotropy as it has been found for 3d metal adatoms on Cu 2 N islands on Cu(100) [43,66,67] or metal-hydrates on h-BN on Rh (111) [44].…”

Section: The Magnetic Anisotropy In Single Spinsmentioning

confidence: 99%

Probing magnetic excitations and correlations in single and coupled spin systems with scanning tunneling spectroscopy

Ternes

2017

Progress in Surface Science

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Spectroscopic measurements with low-temperature scanning tunneling microscopes have been used very successfully for studying not only individual atomic or molecular spins on surfaces but also complexly designed coupled systems. The symmetry breaking of the supporting surface induces magnetic anisotropy which lead to characteristic fingerprints in the spectrum of the differential conductance and can be well understood with simple model Hamiltonians. Furthermore, correlated many-particle states can emerge due to the interaction with itinerant electrons of the electrodes, making these systems ideal prototypical quantum systems. In this manuscript more complex bipartite and spin-chains will be discussed additionally. Their spectra enable to determine precisely the nature of the interactions between the spins which can lead to the formation of new quantum states which emerge by interatomic entanglement. Figure 1: (a) Schematic view of the tunneling process between the electrodes of an idealized tip and sample with their constant densities of states ρt and ρs, respectively: In addition to the elastic tunneling current, an inelastic channel may open at a bias |eV T | ≥ ε i with ε i as the energy difference between the ground and an excited internal state. Under this circumstances an electron crossing the barrier can change its quantum state by losing part of its energy and exciting an internal degree of freedom, for example, the spin orientation of an magnetic adsorbate on the surface. (b) Schematic differential conductance, dI/dV (upper curve) and dI 2 /d 2 V (lower curve), spectra of an inelastic tunneling process. Symmetrically around E F a step like structure at a bias voltage |eV T | = ε i is detected in the dI/dV curve. This is smeared out at non-zero temperature (dashed line) leading to peaks with a width of 5.4k B T in the dI 2 /d 2 V curve. Figure adapted from reference [17].

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Potential Energy Driven Spin Manipulation via a Controllable Hydrogen Ligand

Cited by 2 publications

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Nanomechanical dissipation at a tip-induced Kondo onset

Nanomechanical dissipation at a tip-induced Kondo onset

Probing magnetic excitations and correlations in single and coupled spin systems with scanning tunneling spectroscopy

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