A Superconducting Micro-Magnetometer for Quantum Vortex in Superconducting Nanoflakes

Article Chemistry, Multidisciplinary

High Performance Hall Sensors Built on Chemical Vapor Deposition-Grown Bilayer Graphene

Tongyu Dai et al.

Summary: Graphene has great potential as a material for magnetic sensors or Hall elements. Hall elements based on bilayer graphene exhibit better performance compared to those based on monolayer graphene, with higher sensitivity and lower noise.

ACS OMEGA (2022)

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Article Physics, Multidisciplinary

Quantum oscillation phenomena in low-dimensional superconductors

Bi Xiang-Yu et al.

Summary: Low-dimensional superconductors provide a valuable platform for investigating emergent superconducting quantum oscillation phenomena. These materials, with their low-dimensional nature and quantum confinement effects, have been instrumental in breakthroughs in understanding phenomena such as the superconductor-insulator transition, spin-triplet pairing, vortex dynamics, and charge-vortex duality. This review article discusses three types of superconducting quantum oscillation effects observed in low-dimensional superconductors and their potential applications in quantum computing, device physics, and low-temperature physics.

ACTA PHYSICA SINICA (2022)

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Article Physics, Multidisciplinary

Orbital-selective two-dimensional superconductivity in 2H-NbS2

Xiangyu Bi et al.

Summary: In this study, we experimentally observe the orbital-selective 2D superconductivity in 2H-NbS2 thick flakes through angle-dependent upper critical magnetic field measurements, shedding light on the pairing mechanism and band dimensionality in multiband superconductors.

PHYSICAL REVIEW RESEARCH (2022)

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Article Chemistry, Multidisciplinary

High Performance Hall Sensors Built on Chemical Vapor Deposition-Grown Bilayer Graphene

Tongyu Dai et al.

Summary: Research shows that Hall elements built on bilayer graphene grown by chemical vapor deposition have advantages in performance and potential, exhibiting better performance in practical applications with lower noise and smaller detection magnetic fields compared to monolayer graphene Hall elements.

ACS OMEGA (2022)

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Article Multidisciplinary Sciences

Observation of robust edge superconductivity in Fe(Se,Te) under strong magnetic perturbation

Da Jiang et al.

Summary: The researchers used scanning superconducting quantum interference device microscopy to explore the superfluid density and supercurrent distribution in the iron-chalcogenide high temperature superconductor Fe(Se,Te) (FST), finding that the bulk superconductivity in FST with 10% interstitial Fe was significantly suppressed while the edge still displayed strong superconducting diamagnetism. The temperature dependences of the superfluid density and supercurrent distribution were distinctively different between the edge and the bulk, and magnetic dopants were found to stabilize anti-ferromagnetic spin correlation along the edge, potentially contributing to its robust superconductivity.

SCIENCE BULLETIN (2021)

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Article Physics, Multidisciplinary

Isotropic Pauli-limited superconductivity in the infinite-layer nickelate Nd0.775Sr0.225NiO2

Bai Yang Wang et al.

Summary: Recent studies have observed superconductivity in nickelates, prompting the proposal of various candidate models to understand this phenomenon. By using magnetotransport measurements, researchers were able to probe the superconducting anisotropy in nickelates and found surprising isotropy in the upper critical field despite the layered crystal structure. This suggests that the superconductivity in nickelates is Pauli-limited, unlike traditional layered oxides.

NATURE PHYSICS (2021)

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Review Chemistry, Multidisciplinary

Recent Advances in 2D Superconductors

Dong Qiu et al.

Summary: The emergence of superconductivity in 2D materials has attracted attention due to their unique physical properties. Researchers have made efforts to explore mechanisms behind the unexpected superconductivity phenomena by adjusting different physical parameters. Different types of 2D superconductivity are introduced in the article, along with a perspective towards the future of this field.

ADVANCED MATERIALS (2021)

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Review Physics, Condensed Matter

Frontiers of graphene-based Hall-effect sensors

David Collomb et al.

Summary: Hall sensors have become popular due to their ability to provide a magnetic sense that humans lack. The shift from traditional materials to graphene Hall devices with remarkable physical properties has improved magnetic sensitivity and reduced electronic noise. Graphene Hall probes demonstrate record-breaking performance and pave the way for new application areas such as magnetic imaging and non-destructive testing, with room for further improvement and industry-level scalable fabrication in the future.

JOURNAL OF PHYSICS-CONDENSED MATTER (2021)

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Article Multidisciplinary Sciences