Phthalocyanine based molecular spintronic devices

Barraud, Clément; Bouzéhouane, K.; Deranlot, C.; Kim, D. J.; Rakshit, R. K.; Shi, Shengwei; Arabski, J.; Bowen, M.; Beaurepaire, E.; Boukari, S.; Pétroff, F.; Sénéor, Pierre; Mattana, R.

doi:10.1039/c6dt02467j

Cited by 40 publications

(50 citation statements)

References 39 publications

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“…by varying oxygen concentration in an Ar sputtering plasma during growth 51 , is nominally seeded with impurities to be trapped by these vacancies as PM centers. Control over the electronic properties of, and magnetic interactions 58 between, PM centers in molecules suggests another, organic-based track using spintronic nanojunctions 59,60 . Whatever the route, except for an AF-coupled PM dimer, the PM center(s) should experience dominant tunneling from one spintronic selector in order to adopt that selector's spin referential (see Fig.…”

Section: Discussionmentioning

confidence: 99%

Spin-driven electrical power generation at room temperature

et al. 2019

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Ongoing research is exploring novel energy concepts ranging from classical to quantum thermodynamics. Ferromagnets carry substantial built-in energy due to ordered electron spins. Here, we propose to generate electrical power at room temperature by utilizing this magnetic energy to harvest thermal fluctuations on paramagnetic centers using spintronics. Our spin engine rectifies current fluctuations across the paramagnetic centers' spin states by utilizing so-called 'spinterfaces' with high spin polarization. Analytical and ab-initio theories suggest that experimental data at room temperature from a single MgO magnetic tunnel junction (MTJ) be linked to this spin engine. Device downscaling, other spintronic solutions to select a transport spin channel, and dual oxide/organic materials tracks to introduce paramagnetic centers into the tunnel barrier, widen opportunities for routine device reproduction. At present MgO MTJ densities in next-generation memories, this spin engine could lead to 'always-on' areal power densities that are highly competitive relative to other energy harvesting strategies.

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Section: Discussionmentioning

confidence: 99%

Spin-driven electrical power generation at room temperature

et al. 2019

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“…A special characteristic of transition-metal centered phthalocyanines is, that transition-metal ions often are characterized by a magnetic moment, and therefore such phthalocyanines also show very interesting magnetic behavior [ 9 ]. They have even been discussed in terms of molecular magnets including their discussion in future applications in the field of molecular spintronics [ 10 – 12 ].…”

Section: Reviewmentioning

confidence: 99%

Charge transfer from and to manganese phthalocyanine: bulk materials and interfaces

Rückerl¹,

Waas²,

Büchner³

et al. 2017

Beilstein J. Nanotechnol.

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Manganese phthalocyanine (MnPc) is a member of the family of transition-metal phthalocyanines, which combines interesting electronic behavior in the fields of organic and molecular electronics with local magnetic moments. MnPc is characterized by hybrid states between the Mn 3d orbitals and the π orbitals of the ligand very close to the Fermi level. This causes particular physical properties, different from those of the other phthalocyanines, such as a rather small ionization potential, a small band gap and a large electron affinity. These can be exploited to prepare particular compounds and interfaces with appropriate partners, which are characterized by a charge transfer from or to MnPc. We summarize recent spectroscopic and theoretical results that have been achieved in this regard.

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“…[21][22][23][24][25][26][27][28][29] It has a long-standing tradition in photovoltaics, with a history spanning the first two-layer small molecule solar cell 6 to recent fundamental studies in band structure engineering. 30 Phthalocyanines are also key components in new research directions such as organic spintronics where their spin can be exploited to modulate transport 31,32 or store information. 33,34 Here we demonstrate that it is possible to create organic field effect transistors of CuPc nanowires that have characteristics approaching those of polycrystalline silicon devices.…”

Section: Introductionmentioning

confidence: 99%

Self-Assembled Molecular Nanowires for High-Performance Organic Transistors

Fleet¹,

Stott

Villis

et al. 2017

ACS Appl. Mater. Interfaces

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While organic semiconductors provide tantalizing possibilities for low-cost, light-weight, flexible electronic devices, their current use in transistors-the fundamental building block-is rather limited as their speed and reliability are not competitive with those of their inorganic counterparts and are simply too poor for many practical applications. Through self-assembly, highly ordered nanostructures can be prepared that have more competitive transport characteristics; however, no simple, scalable method has been discovered that can produce devices on the basis of such nanostructures. Here, we show how transistors of self-assembled molecular nanowires can be fabricated using a scalable, gradient sublimation technique, which have dramatically improved characteristics compared to those of their thin-film counterparts, both in terms of performance and stability. Nanowire devices based on copper phthalocyanine have been fabricated with threshold voltages as low as -2.1 V, high on/off ratios of 10, small subthreshold swings of 0.9 V/decade, and mobilities of 0.6 cm/V s, and lower trap energies as deduced from temperature-dependent properties, in line with leading organic semiconductors involving more complex fabrication. High-performance transistors manufactured using our scalable deposition technique, compatible with flexible substrates, could enable integrated all-organic chips implementing conventional as well as neuromorphic computation and combining sensors, logic, data storage, drivers, and displays.

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Phthalocyanine based molecular spintronic devices

Cited by 40 publications

References 39 publications

Spin-driven electrical power generation at room temperature

Spin-driven electrical power generation at room temperature

Charge transfer from and to manganese phthalocyanine: bulk materials and interfaces

Self-Assembled Molecular Nanowires for High-Performance Organic Transistors

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