Quantum-coherent nanoscience

Heinrich, Andreas; Oliver, William; Vandersypen, L. M. K.; Ardavan, Arzhang; Sessoli, Roberta; Loss, Daniel; Jayich, Ania; Fernández-Rossier, J.; Laucht, Arne; Morello, Andrea

doi:10.1038/s41565-021-00994-1

Cited by 116 publications

(115 citation statements)

References 132 publications

(169 reference statements)

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“…However, by slightly increasing the thickness of the molecular film, we detected the retention of the SCO behaviour. This paves the way for the chemical modification of the TTF ligand to avoid the ion-surface interaction, making this system attractive for the development of a molecular-based spintronic device [44].…”

Section: Discussionmentioning

confidence: 99%

Investigation of a Tetrathiafulvalene-Based Fe2+ Thermal Spin Crossover Assembled on Gold Surface

et al. 2022

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A thick film and a monolayer of tetrathiafulvalene-based Fe2+ spin-crossover complex have been deposited by solution on a Au (111) substrate, attempting both self-assembling monolayer protocol and a simpler drop-casting procedure. The thermally induced spin transition has been investigated using X-ray photoelectron spectroscopy (XPS) and X-ray absorption spectroscopy (XAS). Temperature-dependent investigations demonstrated the retention of the switching behavior between the two spin states in thick molecular films obtained by drop-casting, while in the monolayer sample, the loss of the spin-crossover properties appears as a possible consequence of the strong interaction between the sulfur atoms of the ligand and the gold substrate.

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Section: Discussionmentioning

confidence: 99%

Investigation of a Tetrathiafulvalene-Based Fe2+ Thermal Spin Crossover Assembled on Gold Surface

et al. 2022

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“…The design of magnetic molecules able to retain the direction of their magnetic moment for long times [4], commonly known as single-molecule magnets, has been one of the central goals for a large community of chemists, physicists and material scientists for a long time [5]. More recently, the advent of disciplines such as spintronics [6][7][8] and quantum science [9][10][11][12][13] have also attracted the attention of the molecular magnetism community. For instance, it has been experimentally demonstrated that molecules can be embedded in solid-state spintronics [14] devices to influence the flow of currents [15].…”

Section: Introductionmentioning

confidence: 99%

Spin-Phonon Relaxation in Magnetic Molecules: Theory, Predictions and Insights

Lunghi¹

2022

Preprint

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Magnetic molecules have played a central role in the development of magnetism and coordination chemistry and their study keeps leading innovation in cutting-edge scientific fields such as magnetic resonance, magnetism, spintronics, and quantum technologies. Crucially, a long spin lifetime well above cryogenic temperature is a stringent requirement for all these applications. In this chapter we review the foundations of spin relaxation theory and provide a detailed overview of first-principles strategies applied to the problem of spin-phonon relaxation in magnetic molecules. Firstly, we present a rigorous formalism of spin-phonon relaxation based on open quantum systems theory. These results are then used to derive classical phenomenological relations based on the Debye model. Finally, we provide a prescription of how to map the relaxation formalism onto existing electronic structure methods to obtain a quantitative picture of spin-phonon relaxation. Examples from the literature, including both transition metals and lanthanides compounds, will be discussed in order to illustrate how Direct, Orbach and Raman relaxation mechanisms can affect spin dynamics for this class of compounds.

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“…Physical realizations of solid-state spin systems include gate-defined quantum dots, single dopants in semiconductors such as phosphorus donors in silicon, and single defects in insulators such as nitrogen-vacancy centers in diamond [5,6,7]. Harnessing quantum resources at the nanoscale gives birth to the discipline of quantum-coherent nanoscience that may bring forth useful quantum nanodevices "at the bottom" [8,9].…”

Section: Introductionmentioning

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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Quantum-coherent nanoscience

Cited by 116 publications

References 132 publications

Investigation of a Tetrathiafulvalene-Based Fe2+ Thermal Spin Crossover Assembled on Gold Surface

Investigation of a Tetrathiafulvalene-Based Fe2+ Thermal Spin Crossover Assembled on Gold Surface

Spin-Phonon Relaxation in Magnetic Molecules: Theory, Predictions and Insights

Harnessing the Quantum Behavior of Spins on Surfaces

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