Stefan Leible’s Post

Unlocking the secrets of quasicrystal magnetism: Revealing a novel magnetic phase diagram: Non-Heisenberg-type approximant crystals have many interesting properties and are intriguing for researchers of condensed matter physics. However, their magnetic phase diagrams, which are crucial for realizing their potential, remain completely unknown. Now, a team of researchers has constructed the magnetic phase diagram of a non-Heisenberg Tsai-type 1/1 gold-gallium-terbium approximant crystal. This development marks a significant step forward for quasicrystal research and for the realization of magnetic refrigerators and spintronic devices. #ScienceDaily #Technology

#ScienceDailynews #InnovativeResearch #NextGenScience #ExploringFrontiersUnlocking the secrets of quasicrystal magnetism: Revealing a novel magnetic phase diagram . Non-Heisenberg-type approximant crystals have many interesting properties and are intriguing for researchers of condensed matter physics. However, their magnetic phase diagrams, which are crucial for realizing their potential, remain completely unknown. Now, a team of researchers has constructed the magnetic phase diagram of a non-Heisenberg Tsai-type 1/1 gold-gallium-terbium approximant crystal. This development marks a significant step forward for quasicrystal research and for the realization of magnetic refrigerators and spintronic devices.

In an innovative approach to controlling ultrashort laser flashes, researchers from the Universities of Bayreuth and Konstanz are using soliton physics and two pulse combs within a single laser. The method has the potential to drastically speed up and simplify laser applications.

I'm excited to announce our recent open access publication in "Materials Today Physics" in collaboration with our colleagues at Tohoku University. In this paper, we unveiled the first exotic magnetic phase diagram of the non-Heisenberg Tsai-type quasicrystal approximant, using a combination of magnetization and neutron diffraction measurements. We also elucidated the phase selection rule between noncoplanar whirling antiferromagnetic and ferromagnetic orders by analyzing the relative orientation of magnetic moments between nearest-neighbour and next-nearest neighbour sites. The results should help us to better understand intriguing magnetism of not only approximant crystals but also quasicrystals themselves. We hope to advance their potential in emerging technologies like spintronics and magnetic refrigeration. I welcome connections with other researchers interested in magnetism of quasicrystals, or related topics. Please reach out if you would like to discuss collaboration opportunities! Access the full open access paper here: https://lnkd.in/gvaTtkFd

📃Scientific paper: Radiative transfer of Lyman-$\alpha$ photons at cosmic dawn with realistic gas physics Abstract: The cosmic dawn 21-cm signal is enabled by Ly\~$\alpha$ photons through a process called the Wouthuysen-Field effect. An accurate model of the signal in this epoch hinges on the accuracy of the computation of the Ly\~$\alpha$ coupling, which requires one to calculate the specific intensity of UV radiation from sources such as the first stars. Most traditional calculations of the Ly\~$\alpha$ coupling assume a delta-function scattering cross-section, as the resonant nature of the Ly\~$\alpha$ scattering makes an accurate radiative transfer solution computationally expensive. Attempts to improve upon this traditional approach using numerical radiative transfer have recently emerged. However, the radiative transfer computation in these treatments suffers from assumptions such as a uniform density of intergalactic gas, zero gas temperature, and absence of gas bulk motion, or numerical approximations such as core skipping. We investigate the role played by these approximations in setting the value of the Ly\~$\alpha$ coupling and the 21-cm signal at cosmic dawn. We present results of Monte Carlo radiative transfer simulations, without core skipping, and show that neglecting gas temperature in the radiative transfer significantly underestimates the scattering rate and hence the Ly\~$\alpha$ coupling and the 21-cm signal. We also discuss the effect of these processes on the 21-cm power spectrum from the cosmic dawn. This work points the way towards higher-accuracy models to enab... Continued on ES/IODE ➡️ https://etcse.fr/LWw5 ------- If you find this interesting, feel free to follow, comment and share. We need your help to enhance our visibility, so that our platform continues to serve you.

Non-Heisenberg-type approximant crystals have many interesting properties and are intriguing for researchers of condensed matter physics. However, their magnetic phase diagrams, which are crucial for realizing their potential, remain completely unknown. Now, for the first time, a team of researchers has constructed the magnetic phase diagram of a non-Heisenberg Tsai-type 1/1 gold-gallium-terbium approximant crystal. This development marks a significant step forward for quasicrystal research and for the realization of magnetic refrigerators and spintronic devices. #quasicrystals #appliedresearch #tohokuuniversity

A Leap in 2D Materials Research Really impressive work by Jani Kotakoski and his team who showed how electron microscope can be used to study single crystals and pahse transitions of noble gases encapsulated between graphene layers. The study brilliantly captures how these noble gas clusters, when sandwiched between suspended graphene sheets, reveal fascinating atomic through transmission electron microscopy. It's intriguing to see how smaller crystals follow the simple non-directional van der Waals interaction while larger ones show deviations, potentially influenced by the graphene lattice. This paper not only explored the atomic arrangement of these clusters but also explores their dynamic nature within the graphene sandwich, providing valuable insights into the solid-fluid phase transitions under varying conditions. What's particularly exciting is the potential applications of this research in condensed-matter physics and quantum information technology. The paper opens doors to a largely unexplored area of encapsulated 2D van der Waals solids, presenting opportunities for groundbreaking research in material science. The ability to create and analyze such structures at room temperature, thanks to graphene's unique properties, is a testament to the potential of electron microsocpy to explore the new vistas of physics research and make and break atomic strucutres. Kudos to Jani and his team for this remarkable contribution, which is sure to inspire further exploration in the realm of 2D materials. https://lnkd.in/erftUB3V

A Groundbreaking Discovery: Large-Angle Twisted Bilayer #Graphene Unveiled! The rapid development of two-dimensional materials and topological physics has brought twisted bilayer graphene (tBLG) and moiré transition metal dichalcogenides into the spotlight. These materials exhibit complex electronic behaviors and novel phase transitions, particularly under applied magnetic fields. Key concepts such as geometric frustration and correlated insulating states highlight the unconventional behavior of electrons within these periodic superlattices and magnetic fields. However, the understanding of geometric frustration for charge carriers, especially within triangular moiré lattices, remains limited. In these intricate systems, electron behavior is shaped by the interplay between periodic structures and external factors, such as magnetic fields, leading to various possible ground states. A significant challenge is explaining the competition between integer and fractional Chern number states and their delicate balance with electron localization and interactions. Another open question is how geometric frustration impacts charge ordering states and how these states can be observed and controlled in real devices. To address these questions, scientists have conducted both experimental and theoretical studies. Recently, researchers from The Ohio State University, including Haidong Tian, Emilio Codecido, Dan Mao, Marc Bockrath, and Chun Ning Lau, published a groundbreaking paper in Nature Physics, titled “Dominant 1/3-Filling Correlated Insulator States and Orbital Geometric Frustration in Twisted Bilayer Graphene.” Their work explores the localization, wavefunction reconstruction, and magnetic properties of electrons by adjusting the twist angle, doping levels, and magnetic field strength, uncovering new insights into these exotic materials. info@graphenerich.com More reading pls follow: https://lnkd.in/g9pQrv2n

Non-Heisenberg-type approximant crystals have many interesting properties and are intriguing for researchers of condensed matter physics. However, their magnetic phase diagrams, which are crucial for realizing their potential, remain completely unknown. Now, a team of researchers has constructed the magnetic phase diagram of a non-Heisenberg Tsai-type 1/1 gold-gallium-terbium approximant crystal. This development marks a significant step forward for quasicrystal research and for the realization of magnetic refrigerators and spintronic devices.

At nanoscsle, the classical models of material physics fail, giving way to quantum mechanics. The rattling of the Tungsten Carbide 2D sheets subjected to external stretch needs to be modelled quantum mechanically. It is not an anomalous behaviour. It is not understandable through classical models. https://lnkd.in/deyDacQ3