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Probing local magnetic field patterns

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Feb 2021

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Unraveling microscopic mechanisms in condensed matter systems with local magnetic field probes February 11, 2021• 11:00 AM EST Macroscopic .. Read more manifestations of quantum mechanics involving strongly correlated states, e.g. superconductivity and magnetism, are sensitive to the local environment. Nanometer-scale spatial resolution is often required to investigate and identify the conditions for the emergence of such macroscopic behaviors. Magnetic imaging techniques shed light on magnetization patterns, spin configurations, and current distributions, all of which remain invisible in optical or topographic images. Unlike bulk measurements of transport, magnetization, susceptibility, or heat capacity, they provide microscopic information about length scales, inhomogeneity, and interactions. Prof. Martino Poggio will discuss the physics behind these techniques and their applications; Dr. Jelena Trbovic will present the working principle of lock-in amplifiers and their advanced use with local probing techniques. Learning Outcomes: - Local magnetic field probes: SQUID, NV centers, nanowire MFM and their characteristics - Physics of low-dimensional materials and qubits that are affected by the local environment - Principles of phase-sensitive detection and best measurement practice Who Should Attend: - Condensed-matter physics and engineering graduate students interested in quantum properties of nanostructures such as 2D materials, nanowires, and qubits - Industry R&D professionals interested in learning about new techniques for non-invasive magnetic field sensing and testing Capture: Artist’s view ofagraphene Hall bar with local magnetic fields created by the inhomogeneous current flow that can be detected by local magnetic field probes. Credit:Lorenzo Ceccarelli,MartinoPoggio’sLab, University of Basel Sponsored by: Attendance is free. To access the event please register. NOTE: By registering for this webinar you understand and agree that Physics Today willshare your contact information with the sponsors of this webinar and the sponsors may send email communications to you in the future.​

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