Learn about solid-state characteristics: atomic bonding and crystals. ⬇️ https://bit.ly/4cNjpx2
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What better way to start 2024 off than to highlight another success story illustrated by a real-world example of the impact of our active magnetic field cancellation technology in a challenging operational environment. In this case study, Jinming Guo, Professor of Materials Science and Engineering at Hubei University in China, describes how a Dual (2x) SC24 Magnetic Field Cancelling System is critical in enabling the study of ferroelectric materials at an atomic level reducing background magnetic fields down to an industry leading 10 nanoTesla range! #BoldyGoing #ElectromagneticInterference #MagneticFieldCancellation #Ferroelectricmaterials #MagneticField https://lnkd.in/ewFhSUPe
Spicer magnetic field cancelling system actively eliminates image interference in ferroelectric material research
spicerconsulting.com
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Room temperature supercurrents - maybe not that far away. Manh-Ha Doan found clear signatures of correlated exciton (electron-hole pair) tunneling, a precursor to quantum superfluidity, in our WSe2 devices ....at ROOM TEMPERATURE. Exciton condensates have been predicted to support supercurrents, just like superconductivity. But at room temperature? Macroscale quantum behavior is rarely found at high temperatures, but excitons are particularly stable in 2D materials, so it is not impossible. What is also really cool is that the signature conductance spike at zero bias occurred in a very simple device consisting of just a single multilayer WSe2 crystal, that is prepared so that it *itself* forms the three necessary regions: a hole layer, an electron layer and an insulating barrier to separate them - this greatly eliminates the delicate assembly process of the 3 different crystals, as the device in our case is always perfectly self-aligned. If (and that is a big "if") we can demonstrate superfluidity in such devices - it might be way easier to scale these to applications than we thought possible a year ago. Perhaps "superconducting" devices operating at room temperature is not such a distant dream? We will see, hopefully. The paper recently came out in Applied Physics Letters (Appl. Phys. Lett. 123, 143504 (2023))
Signature of correlated electron–hole pair tunneling in multilayer WSe2 at room temperature
pubs.aip.org
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Application Scientist at Lumencor | Microscopist | Biological Physics | Optics | Image Analysis | Python | Soccer
A new spin on materials analysis: Benefits of probing electron spin states at much higher resolution and efficiency https://lnkd.in/gRFqcNE9
A new spin on materials analysis: Benefits of probing electron spin states at much higher resolution and efficiency
phys.org
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How is the high magnetic pressure of superconductors? Although the superconducting transition temperature of high-pressure superconductors is constantly increasing, the mechanism of superconductivity at such high pressures is still an open question. Thanks, www.empere.net https://lnkd.in/eGH9t2-m
High harmonic spectroscopy retrieves electronic structure of high-pressure superconductors
phys.org
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THz Oscillators Based on Cherenkov, Smith—Purcell and Hybrid Radiation Effects, ByKonstantin Lukin, Eduard Khutoryan, Alexei Kuleshov, Sergey Ponomarenko, Matlab Sattorov, Gun-Sik Park Book: Advances in Terahertz Source Technologies ABSTRACT Considered in this chapter, classical vacuum electron devices based on “electron beam-slow-wave” synchronism, such as backward wave oscillator (BWO) [1], Carcinotron [2], clinotron [3], orotron [4], and diffraction radiation oscillator (DRO) [5, 6], have been widely used in microwaves due to outstanding performances combining high levels of output power and wide frequency tuning range. Therefore, at present many research and development activities are focused on filling the THz gap with the help of mentioned above devices. However, there are several reasons for a drastic output power drop in those devices with the wavelength shortening that results in small efficiency of those tubes in the THz frequency range and, therefore, it limits their practical applications. Among these reasons, the most special ones are as follows: (1) technological constraints in the manufacturing of small-scale slow-wave circuits and other components of the tubes; (2) requirements in generation and transportation of the intense electron beams including the problems of fabrication of magnetic system; (3) increase in electromagnetic wave attenuation caused by ohmic losses due to metal surface roughness and skin layer effects; (4) problems of electromagnetic energy extraction from the small-scaled slow-wave circuits, as well as mode competitions, etc.
THz Oscillators Based on Cherenkov, Smith—Purcell and Hybrid Radiation
taylorfrancis.com
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Finally! Our article was published yesterday! https://lnkd.in/dQPPqNpn I am thrilled that the work still pays off two years after my academic years. The World of cuprate superconductors is genuinely fascinating. We still do not know how superconductivity emerges in these materials, which can conduct electricity without loss even above the liquid nitrogen temperature (77 K). If you solve this puzzle AND you can propose materials that will superconduct at ambient pressure and temperature, then you will have solved a large portion of the current energy crisis:) In the paper, we propose an experimental method in which we ''shoot'' very short pulses (microseconds) of large current (0.5 A—which is very large at cryogenic temperatures) on a superconducting cuprate thin film in high magnetic fields (30 T). This multi-extreme environment helps us extract more information from the material and, hopefully, supports further study in this direction, solving the puzzle. Beyond the physics of cuprates, this project has also taught me a lot about non-linear processes and tricky experimental setups (high-voltage, ground loop protection). The knowledge gained through the academic years often comes in handy during my EMC engineering tasks. Many thanks to my former colleagues/co-authors! Caitlin Duffy Sven Badoux Tim Huijbregts Nigel Hussey #superperconductors #physics #research
A pulsed current set-up for use in magnetic fields above 30 T; application to high-temperature superconductors
tandfonline.com
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Editor's Pick #PlasmaPhysics: Raimi Clark and co-authors (Center for Pulsed Power and Power Electronics, Texas Tech Univ) use time-resolved optical emission spectroscopy to explore anode-initiated flashover in vacuum at high-speed. Beautiful discharge observations coupled with important new evidence that surface layer breakdown events.
Spectroscopic investigation of early light emission from anode-initiated surface flashover in vacuum
pubs.aip.org
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Magnetism occurs depending on how electrons behave. For example, the elementary particles can generate an electric current with their charge and thereby induce a magnetic field.
Researchers demonstrate how magnetism can be actively changed by pressure
phys.org
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Magnetism occurs depending on how electrons behave. For example, the elementary particles can generate an electric current with their charge and thereby induce a magnetic field.
Researchers demonstrate how magnetism can be actively changed by pressure
phys.org
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Magnetism occurs depending on how electrons behave. For example, the elementary particles can generate an electric current with their charge and thereby induce a magnetic field. However, magnetism can also arise through the collective alignment of the magnetic moments (spins) in a material. What has not been possible until now, however, is to continuously change the type of magnetism in a crystal.
Researchers demonstrate how magnetism can be actively changed by pressure
phys.org
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