Local Oxidation Nanolithography on Metallic Transition Metal Dichalcogenides Surfaces

Pinilla-Cienfuegos, Elena; Mañas‐Valero, Samuel; Navarro‐Moratalla, Efrén; Tatay, Sergio; Forment‐Aliaga, Alicia; Coronado, Eugenio

doi:10.3390/app6090250

Cited by 14 publications

(16 citation statements)

References 31 publications

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“…The field of nanotechnology has diversified into different areas of research, from materials science to biotechnology. Many of these applications are based on the ability to fabricate or manipulate nanostructured materials [1]. One convenient technique for structuring, manipulation, and fabrication at the nanometer scale is atomic force microscopy (AFM) nanolithography.…”

Section: Introductionmentioning

confidence: 99%

“…On the contrary, the bias-assisted method entails applying a voltage between the AFM tip and the substrate in contact with the sample. The tip-sample voltage induces an electrochemical reaction that produces oxide on the surface of the substrate [1].…”

Section: Introductionmentioning

confidence: 99%

“…Also, the water meniscus around the sample acts as an electrolyte for the chemical reaction. The environment humidity directly influences the size of the meniscus [1]. Below we report nanoscale oxide line formation using AFM anodized lithography.…”

Section: Introductionmentioning

confidence: 99%

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Contact AFM Nanolithography Based on Anodic Oxidation

Melgarejo¹,

Schoenek²,

Zhang³

et al. 2020

Micros. Today

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show abstract

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Contact AFM Nanolithography Based on Anodic Oxidation

Melgarejo¹,

Schoenek²,

Zhang³

et al. 2020

Micros. Today

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“…Among SPL methods, oxidation scanning probe lithography (o-SPL) enables the direct and resist-less nanopatterning of a large variety of materials [4][5][6], from silicon to 2D electronic materials; from self-assembled monolayers to biomolecules. The direct and resist-less lithography offered by o-SPL has generated a variety of nanopatterns on layered materials such as graphene and transition metal dichalcogenides [7][8][9][10][11][12]. The patterning capability has also been exploited to fabricate several electronic devices including quantum point contacts and fieldeffect transistors on layered materials [13][14][15][16][17][18][19][20].…”

Section: Introductionmentioning

confidence: 99%

Chemical and structural analysis of sub-20 nm graphene patterns generated by scanning probe lithography

Dago

Sangiao

Fernández-Pacheco

et al. 2018

Carbon

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Sub-20 nm patterns have been fabricated by using oxidation scanning probe lithography on epitaxial graphene. The structural and chemical properties of these nanopatterns have been characterized by high resolution transmission electron microscopy, energy dispersive X-ray spectroscopy and electron energy loss spectroscopy. The electron microscopy images reveal that the nanolithography process modifies the graphene monolayer and a thin region of the SiC substrate (1 nm thick). Spatially-resolved electron spectroscopies show that the nanopatterns are made of graphene oxide. The combination of spatially-resolved structural and chemical analysis of graphene nanopatterns will enable the development of highperformance graphene devices.

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“…The single-crystal growth details can be found in [36]. A rectangular-shaped sample was obtained following exactly the same method used by Xiao et al [37].…”

mentioning

confidence: 99%

Force-free state in a superconducting single crystal and angle-dependent vortex helical instability

et al. 2017

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Superconducting 2H -NbSe 2 single crystals show intrinsic low pinning values. Therefore, they are ideal materials with which to explore fundamental properties of vortices. (V , I ) characteristics are the experimental data we have used to investigate the dissipation mechanisms in a rectangular-shaped 2H -NbSe 2 single crystal. Particularly, we have studied dissipation behavior with magnetic fields applied in the plane of the crystal and parallel to the injected currents, i.e., in the force-free state where the vortex helical instability governs the vortex dynamics. In this regime, the data follow the elliptic critical state model and the voltage dissipation shows an exponential dependence, V ∝ e α(I −I C ) , I C being the critical current in the force-free configuration and α a linear temperature-dependent parameter. Moreover, this exponential dependence can be observed for in-plane applied magnetic fields up to 40°off the current direction, which implies that the vortex helical instability plays a role in dissipation even out of the force-free configuration. DOI: 10.1103/PhysRevB.95.224510 Vortex physics is a long-standing topic which remains open in many scenarios. Vortices are objects which can be entangled, crossed, cut, and reconnected. The study of vortices as topological defects encompasses many fields, such as plasmas [1], fluids [2][3][4][5], superfluids [6][7][8][9], and superconductors [10][11][12][13][14][15]. Sometimes fundamental properties of superconducting vortices are blurred by the crucial role played by vortex pinning. To avoid this problem and capture basic vortex dynamics in superconductors, materials with very low pinning are required, for example, superconducting dichalcogenide single crystals [16]. These layered platelets present large crystal sizes; they are very stable and very easy to handle, too. They show very low Ginzburg number (Gi) ∼ 10 −6 ; that is, they have very low thermal fluctuations and very low critical current density (J C ) in comparison with the depairing current density (J 0 ), for instance J C /J 0 ∼ 10 −5 , thus showing very low pinning. These crystals are an ideal tool to explore fundamental superconducting properties. Some topics that have been studied include two-dimensional (2D) superconductivity, i.e., superconducting samples whose thickness is much lower than the Ginzburg-Landau coherence length [17] summary, single-crystal dichalcogenides have been ideal materials to study many superconducting topics.In this paper, we report on the vortex lattice dynamics in the force-free state in single-crystal dichalcogenide 2H -NbSe 2 . In this force-free state the magnetic field is applied in plane and parallel to the electrical current direction. Consequently, in theory, the Lorentz force on the vortex lattice is null. Therefore, from the theoretical point of view and in a pin-free situation the supercurrent can flow infinitely. In 1966, Josephson argued that the superconducting mixed state allows unstable states to be realized. He pointed out that, if the sample is ...

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Local Oxidation Nanolithography on Metallic Transition Metal Dichalcogenides Surfaces

Cited by 14 publications

References 31 publications

Contact AFM Nanolithography Based on Anodic Oxidation

Contact AFM Nanolithography Based on Anodic Oxidation

Chemical and structural analysis of sub-20 nm graphene patterns generated by scanning probe lithography

Force-free state in a superconducting single crystal and angle-dependent vortex helical instability

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