A scanning tunneling microscope capable of electron spin resonance and pump–probe spectroscopy at mK temperature and in vector magnetic field

Weerdenburg, Werner M. J. van; Steinbrecher, Manuel; Mullekom, Niels P. E. van; Gerritsen, Jan W.; Allwörden, Henning von; Natterer, Fabian Donat; Khajetoorians, Alexander A.

doi:10.1063/5.0040011

Cited by 23 publications

(13 citation statements)

References 54 publications

(119 reference statements)

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“…Such a barrier can easily be overcome if a plasmon couples to a vibrational or hindered rotational mode . While we found connections between the plasmon resonance intensity and the shuttling dynamics (see Supporting Information Section S6) in support of this interpretation, the strong polarity dependence of the threshold biases calls for future studies with improved time resolution. , …”

supporting

confidence: 60%

Plasmon-Driven Motion of an Individual Molecule

Hung¹,

Kiraly²,

Strik³

et al. 2021

Nano Lett.

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We demonstrate that nanocavity plasmons generated a few nanometers away from a molecule can induce molecular motion. For this, we study the well-known rapid shuttling motion of zinc phthalocyanine molecules adsorbed on ultrathin NaCl films by combining scanning tunneling microscopy (STM) and spectroscopy (STS) with STM-induced light emission. Comparing spatially resolved single-molecule luminescence spectra from molecules anchored to a step edge with isolated molecules adsorbed on the free surface, we found that the azimuthal modulation of the Lamb shift is diminished in case of the latter. This is evidence that the rapid shuttling motion is remotely induced by plasmon-exciton coupling. Plasmoninduced molecular motion may open an interesting playground to bridge the nanoscopic and mesoscopic worlds by combining molecular machines with nanoplasmonics to control directed motion of single molecules without the need for local probes.

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supporting

confidence: 60%

Plasmon-Driven Motion of an Individual Molecule

Hung¹,

Kiraly²,

Strik³

et al. 2021

Nano Lett.

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“…Some examples of ESR-STM instruments can be found in Refs. [73,74,75,76]. As shown in Figure 2a, at the heart of the apparatus is an STM that allows access to individual spins on a surface.…”

Section: Experimental Apparatusmentioning

confidence: 99%

Harnessing the Quantum Behavior of Spins on Surfaces

Chen,

Bae,

Heinrich

2021

Preprint

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The desire to control and measure individual quantum systems such as atoms and ions in a vacuum has led to significant scientific and engineering developments in the past decades that form the basis of today's quantum information science. Single atoms and molecules on surfaces, on the other hand, are heavily investigated by physicists, chemists, and material scientists in search of novel electronic and magnetic functionalities. These two paths crossed in 2015 when it was first clearly demonstrated that individual spins on a surface can be coherently controlled and read out in an all-electrical fashion. The enabling technique is a combination of scanning tunneling microscopy (STM) and electron spin resonance (ESR), which offers unprecedented coherent controllability at the Angstrom length scale. This review aims to illustrate the essential ingredients that allow the quantum operations of single spins on surfaces. Three domains of applications of surface spins, namely quantum sensing, quantum control, and quantum simulation, are discussed with physical principles explained and examples presented. Enabled by the atomically-precise fabrication capability of STM, single spins on surfaces might one day lead to the realization of quantum nanodevices and artificial quantum materials at the atomic scale.

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“…We also address the effect of the spin noises on the coherence properties of the YSR qubit, and show a robust behaviour for a wide range of experimentally relevant parameters. Our proposal is feasible with state-ofthe-art experimental techniques, because controlled coupling of YSR states in impurity dimers have already been experimentally demonstrated [66][67][68][69] and the manipulation of the impurity spins is possible through the STM electron spin resonance (STM-ESR) techniques [70][71][72][73][74]. Finally, we discuss the possibilities to utilize the YSR qubits in hybrid systems where they are coupled to Majorana qubits.…”

Section: Introductionmentioning

confidence: 99%

Yu-Shiba-Rusinov qubit

Mishra,

Simon,

Hyart

et al. 2021

Preprint

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Magnetic impurities in s-wave superconductors lead to spin-polarized Yu-Shiba-Rusinov (YSR) in-gap states. Chains of magnetic impurities offer one of the most viable routes for the realization of Majorana bound states which hold a promise for topological quantum computing. However, this ambitious goal looks distant since no quantum coherent degrees of freedom have yet been identified in these systems. To fill this gap we propose an effective two-level system, a YSR qubit, stemming from two nearby impurities. Using a time-dependent wave-function approach, we derive an effective Hamiltonian describing the YSR qubit evolution as a function of distance between the impurity spins, their relative orientations, and their dynamics. We show that the YSR qubit can be controlled and read out using state-of-the-art experimental techniques for manipulation of the spins. Finally, we address the effect of spin noise on the coherence properties of the YSR qubit, and show a robust behaviour for a wide range of experimentally relevant parameters. Looking forward, the YSR qubit could facilitate the implementation of a universal set of quantum gates in hybrid systems where they are coupled to topological Majorana qubits.

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A scanning tunneling microscope capable of electron spin resonance and pump–probe spectroscopy at mK temperature and in vector magnetic field

Cited by 23 publications

References 54 publications

Plasmon-Driven Motion of an Individual Molecule

Plasmon-Driven Motion of an Individual Molecule

Harnessing the Quantum Behavior of Spins on Surfaces

Yu-Shiba-Rusinov qubit

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