Manipulating Anisotropic Transport and Superconductivity by Focused Ion Beam Microstructuring

Bachmann, Maja D.

doi:10.1007/978-3-030-51362-7

Cited by 3 publications

(1 citation statement)

References 173 publications

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“…In SIBM, energetic ions are poured over the whole substrate. In FIBM, ions are concentrated on a spot directed to a particular workpiece part [ 196 ]. Although SIBM is slower and more controlled, it can be used as RIE.…”

Section: Techniques Of Preparation Of Mns (Mns)mentioning

confidence: 99%

Recent Advancements in Microneedle Technology for Multifaceted Biomedical Applications

Kulkarni¹,

Damiri

Rojekar

et al. 2022

Pharmaceutics

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Microneedle (MNs) technology is a recent advancement in biomedical science across the globe. The current limitations of drug delivery, like poor absorption, low bioavailability, inadequate skin permeation, and poor biodistribution, can be overcome by MN-based drug delivery. Nanotechnology made significant changes in fabrication techniques for microneedles (MNs) and design shifted from conventional to novel, using various types of natural and synthetic materials and their combinations. Nowadays, MNs technology has gained popularity worldwide in biomedical research and drug delivery technology due to its multifaceted and broad-spectrum applications. This review broadly discusses MN’s types, fabrication methods, composition, characterization, applications, recent advancements, and global intellectual scenarios.

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Section: Techniques Of Preparation Of Mns (Mns)mentioning

confidence: 99%

Recent Advancements in Microneedle Technology for Multifaceted Biomedical Applications

Kulkarni¹,

Damiri

Rojekar

et al. 2022

Pharmaceutics

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Low-symmetry nonlocal transport in microstructured squares of delafossite metals

McGuinness

Zhakina

König

et al. 2021

Proc. Natl. Acad. Sci. U.S.A.

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Intense work studying the ballistic regime of electron transport in two-dimensional systems based on semiconductors and graphene had been thought to have established most of the key experimental facts of the field. In recent years, however, additional forms of ballistic transport have become accessible in the quasi–two-dimensional delafossite metals, whose Fermi wavelength is a factor of 100 shorter than those typically studied in the previous work and whose Fermi surfaces are nearly hexagonal in shape and therefore strongly faceted. This has some profound consequences for results obtained from the classic ballistic transport experiment of studying bend and Hall resistances in mesoscopic squares fabricated from delafossite single crystals. We observe pronounced anisotropies in bend resistances and even a Hall voltage that is strongly asymmetric in magnetic field. Although some of our observations are nonintuitive at first sight, we show that they can be understood within a nonlocal Landauer-Büttiker analysis tailored to the symmetries of the square/hexagonal geometries of our combined device/Fermi surface system. Signatures of nonlocal transport can be resolved for squares of linear dimension of nearly 100 µm, approximately a factor of 15 larger than the bulk mean free path of the crystal from which the device was fabricated.

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Probing the Shape of the Weyl Fermi Surface of NbP Using Transverse Electron Focusing

Balduini,

Rocchino,

Molinari

et al. 2024

Phys. Rev. Lett.

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Weyl semimetals are defined by their unique Fermi surface, comprising pairs of Weyl points of opposite chirality, connected through topological surface states. Angle-resolved photoemission spectroscopy (ARPES) has been used to verify the existence of the Weyl points and the Fermi arcs. However, ARPES is limited in resolution, leading to significant uncertainty when characterizing the shape of the Fermi surface of semimetals and measuring features such as the distance between the Weyl points. Here, to surpass the resolution of ARPES, we combine quantum oscillation measurements with transverse electron focusing experiments. These techniques offer complementary information, enabling the reconstruction of the distinctive peanut-shaped cross section of the Weyl Fermi surface and accurately determining the separation between Weyl points in the Weyl semimetal NbP. Our Letter showcases the integration of quantum oscillations and transverse electron focusing, allowing for the measurements of complex Fermi surface geometries, concurrently with carriers’ transport properties, in high-mobility quantum materials. Published by the American Physical Society 2024

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Manipulating Anisotropic Transport and Superconductivity by Focused Ion Beam Microstructuring

Cited by 3 publications

References 173 publications

Recent Advancements in Microneedle Technology for Multifaceted Biomedical Applications

Recent Advancements in Microneedle Technology for Multifaceted Biomedical Applications

Low-symmetry nonlocal transport in microstructured squares of delafossite metals

Probing the Shape of the Weyl Fermi Surface of NbP Using Transverse Electron Focusing

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