Current Spin News and Events

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Spintronics: New production method makes crystalline microstructures universally usable
New storage and information technology requires new higher performance materials. One of these materials is yttrium iron garnet, which has special magnetic properties. Thanks to a new process, it can now be transferred to any material. Developed by physicists at Martin Luther University Halle-Wittenberg (MLU), the method could advance the production of smaller, faster and more energy-efficient components for data storage and information processing. The physicists have published their results in the journal ''Applied Physics Letters''. (2021-02-23)

SwRI scientists image a bright meteoroid explosion in Jupiter's atmosphere
From aboard the Juno spacecraft, a Southwest Research Institute-led instrument observing auroras serendipitously spotted a bright flash above Jupiter's clouds last spring. The Ultraviolet Spectrograph (UVS) team studied the data and determined that they had captured a bolide, an extremely bright meteoroid explosion in the gas giant's upper atmosphere. (2021-02-22)

Researchers grow artificial hairs with clever physics trick
Things just got hairy at Princeton. Researchers found they could coat a liquid elastic on the outside of a disc and spin it to form useful, complex patterns. When spun just right, tiny spindles rise from the material as it cures. The spindles grow as the disc accelerates, forming a soft solid that resembles hairs. Published in PNAS Feb. 22 (2021-02-22)

Spin hall effect of light with near 100% efficiency
POSTECH-KAIST joint research team develops perfect SHEL using anisotropic metasurfaces. (2021-02-18)

Light used to detect quantum information stored in 100,000 nuclear quantum bits
Researchers have found a way to use light and a single electron to communicate with a cloud of quantum bits and sense their behaviour, making it possible to detect a single quantum bit in a dense cloud. (2021-02-15)

Quantum computing enables simulations to unravel mysteries of magnetic materials
A multi-institutional team became the first to generate accurate results from materials science simulations on a quantum computer that can be verified with neutron scattering experiments and other practical techniques. (2021-02-09)

A magnetic twist to graphene
By combining ferromagnets and two rotated layers of graphene, researchers open up a new platform for strongly interacting states using graphene's unique quantum degree of freedom. (2021-02-08)

'Magnetic graphene' forms a new kind of magnetism
Researchers have identified a new form of magnetism in so-called magnetic graphene, which could point the way toward understanding superconductivity in this unusual type of material. (2021-02-08)

From heat to spin to electricity: Understanding spin transport in thermoelectric devices
Spin thermoelectric materials are an area of active research because of their potential applications in thermal energy harvesters. However, the physics underlying the effects of interlayers in these materials on spin transport phenomena are unclear. In a recent study, scientists from Chung-Ang University, Korea, shed light on this topic using a newly developed platform to measure the spin Seebeck effect. Their findings pave the way to large-area thermoelectric materials with enhanced properties. (2021-01-28)

Extreme black holes have hair that can be combed
Black holes depend on only three parameters (mass, angular momentum, and charge), a uniqueness property known as the ''no-hair'' theorem. In a Letter published in the Physical Review D, researchers announce finding an exception: a class of black holes, known as extreme black holes, that has classical hair in the vaccuum Einstein theory. The newly discovered hair depends on how the black hole formed, thus violating the uniqueness, or ''no hair'' theorem. (2021-01-26)

One-dimensional quantum nanowires fertile ground for Majorana zero modes
One-dimensional quantum 'nanowires' - which have length, but no width or height - provide a unique environment for the formation and detection of a quasiparticle known as a Majorana zero mode, which are their own antimatter particle. A new UNSW advance in detection of these exotic quasiparticles (just published in Nature Communications) has potential applications in fault-resistant topological quantum computers, and topological superconductivity. (2021-01-19)

Scientists streamline process for controlling spin dynamics
Marking a major achievement in the field of spintronics, researchers at Brookhaven National Laboratory and Yale University have demonstrated the ability to control spin dynamics in magnetic materials by altering their thickness. The study, published today in Nature Materials, could lead to smaller, more energy-efficient electronic devices. (2021-01-18)

Rethinking spin chemistry from a quantum perspective
Summary Researchers at Osaka City University use quantum superposition states and Bayesian inference to create a quantum algorithm, easily executable on quantum computers, that accurately and directly calculates energy differences between the electronic ground and excited spin states of molecular systems in polynomial time. (2021-01-18)

Scientists' discovery is paving the way for novel ultrafast quantum computers
Scientists at the Institute of Physics of the University of Tartu have found a way to develop optical quantum computers of a new type. Central to the discovery are rare earth ions that have certain characteristics and can act as quantum bits. These would give quantum computers ultrafast computation speed and better reliability compared to earlier solutions. The University of Tartu researchers Vladimir Hizhnyakov, Vadim Boltrushko, Helle Kaasik and Yurii Orlovskii published the results of their research in the scientific journal Optics Communications. (2021-01-15)

New way to control electrical charge in 2D materials: Put a flake on it
Gaining control of the flow of electrical current through atomically thin materials is important to potential future applications in photovoltaics or computing. Physicists in Arts & Sciences at Washington University in St. Louis have discovered one way to locally add electrical charge to a graphene device. (2021-01-14)

Could we harness energy from black holes?
Physicists have found a new way to extract energy from black holes by breaking and rejoining magnetic field lines near the event horizon. (2021-01-13)

The changing paradigm of next-generation semiconductor memory development
The Korea Institute of Science and Technology(KIST) has announced that the research team led by Dr. Kim Kyoung-Whan at the Center for Spintronics has proposed a new principle about spin memory devices, which are next-generation memory devices. This breakthrough presents new applicability that is different from the existing paradigm. (2021-01-12)

Enlightening dark ions
Every field has its underlying principles. For economics it's the rational actor; biology has the theory of evolution; modern geology rests on the bedrock of plate tectonics. (2021-01-12)

Electrically switchable qubit can tune between storage and fast calculation modes
To perform calculations, quantum computers need qubits to act as elementary building blocks that process and store information. Now, physicists have produced a new type of qubit that can be switched from a stable idle mode to a fast calculation mode. The concept would also allow a large number of qubits to be combined into a powerful quantum computer, as researchers from the University of Basel and TU Eindhoven have reported in the journal Nature Nanotechnology. (2021-01-11)

Researchers question fundamental study on the Kondo effect
In 1998, spectroscopic studies on the Kondo effect using scanning tunnelling microscopy were published, which are considered ground-breaking and have triggered countless others of a similar kind. Many of these studies may have to be re-examined now that researchers from Jülich, Germany have shown that the Kondo effect cannot be proven beyond doubt by this method. Instead, another phenomenon is creating precisely the spectroscopic ''fingerprint'' that was previously attributed to the Kondo effect. (2021-01-07)

A bit too much: reducing the bit width of Ising models for quantum annealing
Quantum annealers are devices that physically implement a quantum system called the 'Ising model' to solve combinatorial optimization problems. However, the coefficients of the Ising model often require a large bit width, making it difficult to implement physically. Now, scientists from Japan demonstrate a method to reduce the bit width of any Ising model, increasing the applicability and versatility of quantum annealers in many fields, including cryptography, logistics, and artificial intelligence. (2021-01-06)

A high order for a low dimension
Spintronics refers to a suite of physical systems which may one day replace many electronic systems. To realize this generational leap, material components that confine electrons in one dimension are highly sought after. For the first time, researchers created such a material in the form of a special bismuth-based crystal known as a high-order topological insulator. (2021-01-04)

Industry collaboration leads to important milestone in the creation of a quantum computer
One of the obstacles for progress in the quest for a working quantum computer has been that the working devices that go into a quantum computer and perform the actual calculations, the qubits, have hitherto been made by universities and in small numbers. But in recent years, a pan-European collaboration, in partnership with French microelectronics leader CEA-Leti, has been exploring everyday transistors--that are present in billions in all our mobile phones--for their use as qubits. (2020-12-28)

Performance breakthrough by topological-insulator into a waveguide-resonator system
Topological insulator (TI), a major discovery in condensed matter physics since this century, has now been introduced into waveguide-resonator systems. Along with basic similarities with classical ones, a TI enhanced system shows great advantages. A recent research in Nanjing University boosted the confidence of using the concepts of TI for practical device performance and functionalities, with applications being novel signal processing, sensing, lasering, energy harvesting, and intense wave-matter interactions. (2020-12-20)

New discovery brings analogue spintronic devices closer
The observation of nonlinearity in electron spin-related processes in graphene makes it easier to transport, manipulate and detect spins, as well as spin-to-charge conversion. It also allows analogue operations such as amplitude modulation and spin amplification. This brings spintronics to the point where regular electronics was after the introduction of the first transistors. These results by University of Groningen physicists were published in the journal Physical Review Applied on 17 December. (2020-12-18)

New topological properties found in "old" material of Cobalt disulfide
Researchers working with the Schoop Lab discovered the presence of Weyl nodes in bulk CoS2 that allow them to make predictions about its surface properties. The material hosts Weyl-fermions and Fermi-arc surface states within its band structure, which may enable it to serve as a platform for exotic phenomena. (2020-12-18)

Ultra-thin designer materials unlock quantum phenomena
New research, published in Nature, has measured highly sought-after Majorana quantum states (2020-12-17)

Semiconductor material analysis made possible with artificial intelligence
Researchers in South Korea have developed an artificial intelligence (AI) system that can analyze magnetic systems in an instant. The Korea Institute of Science and Technology(KIST) reported that the collaborative research team led by Dr. Heeyong Kwon and Dr. Junwoo Choi from Spin Convergence Research Center and Professor Changyeon Won from Kyung Hee University developed a technique for estimating magnetic Hamiltonian parameters from spin structure images using AI techniques. (2020-12-16)

Ultracold atoms reveal a new type of quantum magnetic behavior
An MIT experiment with ultracold atoms reveals new quantum magnetic behavior that may help in design of spintronic devices and magnetic materials. (2020-12-16)

Information transport in antiferromagnets via pseudospin-magnons
A team of researchers from the Technical University of Munich (TUM), the Bavarian Academy of Sciences and Humanities (BAdW), and the Norwegian University of Science and Technology (NTNU) in Trondheim has discovered an exciting method for controlling spin carried by quantized spin wave excitations in antiferromagnetic insulators. (2020-12-16)

Energy-efficient magnetic RAM: A new building block for spintronic technologies
Researchers demonstrate a new way to enhance the energy efficiency of the non-volatile magnetic memory. (2020-12-10)

Faster and more efficient information transfer
Physicists use antiferromagnetic rust to carry information over long distances at room temperature (2020-12-10)

Shining a light on what's really happening in perovskite solar cells
Researchers from the University of Tsukuba used electron spin resonance spectroscopy to follow the internal deterioration mechanism of perovskite solar cells while they were in operation. They showed correlation between changes in the spin states and the performance of the solar cells. It is hoped that the findings will provide a useful starting point for the continued development of perovskite solar cells and ultimately contribute to viable green energy solutions. (2020-12-09)

Ultrafast dynamics of chiral spin structures observed after optical excitation
A joint research project of Johannes Gutenberg University Mainz (JGU), the University of Siegen, Forschungszentrum Jülich, and the Elettra Synchrotron Trieste has achieved a new milestone for the ultra-fast control of magnetism. (2020-12-09)

Experiment to test quantum gravity just got a bit less complicated
Is gravity a quantum phenomenon? That has been one of the big outstanding questions in physics for decades. Together with colleagues from the UK, Anupam Mazumdar, a physicist from the University of Groningen, proposed an experiment that could settle the issue. However, it requires studying two very large entangled quantum systems in freefall. In a new paper, Mazumdar presents a way to reduce background noise to make this experiment more manageable. (2020-12-08)

In new step toward quantum tech, scientists synthesize 'bright' quantum bits
Qubits (short for quantum bits) are often made of the same semiconducting materials as our everyday electronics. But now an interdisciplinary team of chemists and physicists at Northwestern University and the University of Chicago has developed a new method to create tailor-made qubits: by chemically synthesizing molecules that encode quantum information into their magnetic, or ''spin,'' states. This new bottom-up approach could ultimately lead to quantum systems that have extraordinary flexibility and control, helping pave the way for next-generation quantum technology. (2020-12-08)

Split wave
Neural networks are some of the most important tools in AI. So far, they run on traditional processors in the form of adaptive software, but experts are working on an alternative concept, the ''neuromorphic computer''. In this case, neurons are not simulated by software but reconstructed in hardware components. A team of researchers at HZDR has now demonstrated a new approach to such hardware - targeted magnetic waves that are generated and divided in micrometer-sized wafers. (2020-12-07)

Rise of the underdog: a neglected mechanism in antiferromagnets may be key to spintronics
Scientists at Tokyo Institute of Technology (Tokyo Tech) discover a mechanism in antiferromagnets that could be useful for spintronic devices. They theoretically and experimentally demonstrate that one of the magnetization torques arising from optically driven excitations has a much stronger influence on spin orientation than previously given credit for. These findings could provide a new and highly efficient mechanism for manipulating spin. (2020-12-07)

Supercomputer simulations could unlock mystery of Moon's formation
Astronomers have taken a step towards understanding how the Moon might have formed out of a giant collision between the early Earth and another massive object 4.5 billion years ago. (2020-12-03)

Electrical spin filtering the key to ultra-fast, energy-efficient spintronics
A new UNSW study is a step towards even-faster, more energy-efficient 'spintronic' technology - an exciting, beyond-CMOS technology. The new study applies 'spin-filtering' to separate spin orientation, allowing generation and detection of spin via electrical (rather than magnetic) means, because electric fields are a lot less energetically costly to generate than magnetic fields. (2020-12-03)

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