Current Fermions News and Events

Current Fermions News and Events, Fermions News Articles.
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Pitt researchers create nanoscale slalom course for electrons
''We already know how to shoot electrons ballistically through one-dimensional nanowires made from these oxide materials,'' explains Levy. ''What is different here is that we have changed the environment for the electrons, forcing them to weave left and right as they travel. This motion changes the properties of the electrons, giving rise to new behavior.'' (2020-11-25)

Ideal type-II Weyl points are observed in classical circuits
As one kind of elementary particles, Weyl fermions manifest themselves as Weyl points from dispersion relations. Although the type-II Weyl points with strongly tilted band structures have been observed in different systems, their ideal form where the Weyl points are symmetry-related and well-separated, and reside at the same energy and far from nontopological bands are never observed. Now scientist based in China and Singapore observe the ideal type-II Weyl points in classical circuits. (2020-11-24)

Staying ahead of the curve with 3D curved graphene
A team of researchers has amplified 3D graphene's electrical properties by controlling its curvature. (2020-11-20)

Manchester group discover new family of quasiparticles in graphene-based materials
After years of dedicated research a group of pioneering scientists led by Nobel Laureate Andre Geim have again revealed a phenomenon that is 'radically different from textbook physics' and this work has led to the discovery and characterisation of a new family of quasiparticles found in graphene-based materials. Called Brown-Zak fermions these extraordinary particles have the potential to achieve the Holy Grail of 2D materials by having ultra-high frequency transistors which can in turn produce a new generation of superfast electronic devices. (2020-11-13)

Connecting two classes of unconventional superconductors
The understanding of unconventional superconductivity is one of the most challenging and fascinating tasks of solid-state physics. Different classes of unconventional superconductors share that superconductivity emerges near a magnetic phase despite the underlying physics is different. (2020-11-11)

New approach to exotic quantum matter
A team of international researchers reports on new advances in the understanding of fractional angular momentum and anyon statistics of impurities in Laughlin liquids. (2020-09-22)

A quantum thermometer to measure the coldest temperatures in the universe
The physicists' proposed thermometer is based on quantum entanglement and can accurately measure temperatures a billion times colder than those in outer space. It would be used to answer fundamental research questions and to study how matter behaves in extreme quantum states. (2020-08-20)

Ferried across: Figuring out unconventional spin transport in quantum spin liquids
Scientists at Tokyo Institute of Technology and Yokohama National University uncover the peculiar mechanism by which spin perturbations travel through a seemingly unpassable region of a quantum spin liquid system. This new insight may represent another building block in next-generation electronics and even quantum computers. (2020-07-27)

Electrons obey social distancing in 'strange' metals
A Cornell University-led collaboration has used state-of-the-art computational tools to model the chaotic behavior of Planckian, or ''strange,'' metals. This behavior has long intrigued physicists, but they have not been able to simulate it down to the lowest possible temperature until now. (2020-07-23)

Higher-order topology found in 2D crystal
The research team took a new approach by using the Josephson junctions to spatially resolve the supercurrent flow and to show that WTe2 does indeed appear to have hinge states and be a higher-order topological insulator. They have identified a new higher-order topological insulator. It is a layered two-dimensional transition metal dichalcogenide (TMDC) called WTe2. This is a famous material in condensed matter physics that displays a variety of exotic properties from titanic magnetoresistance to quantized spin hall effect. (2020-07-15)

Excitation of robust materials
So-called topological materials have special electronic properties, which are very robust against external perturbations. In tungsten ditelluride such a topologically protected state can be ''broken up'' using special laser pulses within picoseconds and thus change its properties. This could be a key requirement for realising extremely fast, optoelectronic switches. For the first time, physicists at Kiel University observed changes to the electronic properties of this material in experiments in real-time. (2020-07-07)

Study: could dark matter be hiding in existing data?
A new study, led by researchers at Berkeley Lab and UC Berkeley, suggests new paths for catching the signals of dark matter particles that have their energy absorbed by atomic nuclei. (2020-05-04)

Advanced memory from advanced materials
Researchers successfully demonstrated a method to switch a novel material between two different nonvolatile states at very high speeds and with great accuracy. The physical constituents of the device in question are significantly robust against external influences such as magnetic fields. These facts together mean a high-speed and high-capacity memory device could be created. Such a device would also be extremely energy efficient. (2020-04-20)

Seeking sounds of superfluids
Sound waves reveal the unique properties of an ultracold quantum gas, a model system for describing certain superconductors and forms of nuclear matter. A new Australian study examines the propagation of energy as sound waves in a quantum gas, revealing for the first time strong variations in the nature of the sound wave as a function of temperature. (2020-04-14)

Boson particles discovery provides insights for quantum computing
Researchers working on a U.S. Army project discovered a key insight for the development of quantum devices and quantum computers. Scientists found that a class of particles known as bosons can behave as an opposite class of particles called fermions, when forced into a line. (2020-04-14)

Quantum copycat: Researchers find a new way in which bosons behave like fermions
When a one-dimensional gas of strongly interacting bosons expands, the velocity distribution of the bosons transforms into one that is identical to non-interacting fermions. (2020-03-27)

Entanglement by identity, or interaction without ever touching
What is interaction and when does it occur? Intuition suggests that the necessary condition for the interaction of independently created particles is their direct touch or contact through physical force carriers. In quantum mechanics, the result of the interaction is entanglement - the appearance of non-classical correlations in the system. It seems that quantum theory allows entanglement of independent particles without any contact. The fundamental identity of particles of the same kind is responsible for this phenomenon. (2020-03-24)

Exotic new topological state discovered in Dirac semimetals
An international team of scientists has discovered an exotic new form of topological state in a large class of 3D semi-metallic crystals called Dirac semimetals. The researchers developed extensive mathematical machinery to bridge the gap between theoretical models with forms of 'higher-order' topology (topology that manifests only at the boundary of a boundary) and the physical behavior of electrons in real materials. (2020-01-31)

The case of the elusive Majorana: The so-called 'angel particle' is still a mystery
A 2017 report of the discovery of a particular kind of Majorana fermion--the chiral Majorana fermion, referred to as the 'angel particle'--is likely a false alarm, according to new research. (2020-01-03)

New material breaks world record turning heat into electricity
Thermoelectric materials convert heat into electrical energy. The amount of energy that can be generated is measured by the so-called ZT value. The best thermoelectrics to date were measured at ZT values of around 2.5 to 2.8. Scientists at TU Wien have now developed a completely new material with a ZT value of 5 to 6. It is so effective that it could be used to provide energy for sensors or even small computer processors. (2019-11-14)

Research reveals new state of matter: a Cooper pair metal
In a finding that reveals an entirely new state of matter, research published in the journal Science shows that Cooper pairs, electron duos that enable superconductivity, can also conduct electricity like normal metals do. (2019-11-14)

Quantum transition makes electrons behave as if they lack spin
Combining experiments under extreme conditions with theoretical analysis, researchers pursue knowledge that could be used in the future to create a new generation of sustainable functional materials for use in quantum information devices or superconductors. (2019-11-13)

Topological nanoelectronics
Physicists at the University of Würzburg have made a ground-breaking discovery: They have realized a fundamental nanoelectronic device based on the topological insulator HgTe previously discovered in Würzburg. (2019-10-28)

Johns Hopkins researchers discover material that could someday power quantum computer
Quantum computers with the ability to perform complex calculations, encrypt data more securely and more quickly predict the spread of viruses, may be within closer reach thanks to a new discovery by Johns Hopkins researchers. (2019-10-10)

Axion particle spotted in solid-state crystal
Scientists at the Max Planck Institute for Chemical Physics of Solids in Dresden, Princeton University, the University of Illinois at Urbana-Champaign, and the University of the Chinese Academy of Sciences have spotted a famously elusive particle: The axion - first predicted 42 years ago as an elementary particle in extensions of the standard model of particle physics. (2019-10-07)

Princeton physicists discover topological behavior of electrons in 3D magnetic material
Researchers explored a type of material in which the electrons behave according to the mathematical rules of topology. They found topological behaviors of electrons in a three-dimensional magnetic material at room temperature, opening new avenues of future study. (2019-09-19)

Novel mechanism of electron scattering in graphene-like 2D materials
Suggesting an unconventional way to manipulate the properties of 2D materials in the presence of a Bose-Einstein condensate, and an alternative strategy to design high-temperature superconductors. (2019-09-17)

Break in temporal symmetry produces molecules that can encode information
Theoretical findings in a study performed by researchers with FAPESP's support and published in Scientific Reports could be exploited in the development of quantum computing. (2019-08-28)

Crossover from 2D metal to 3D Dirac semimetal in metallic PtTe2 films with local Rashba effect
Shuyun Zhou's group from Tsinghua University reported the evolution of the electronic structure of PtTe2 thin films using angle-resolved photoemission spectroscopy. A transition from 2D metal at 2 monolayers (ML) to 3D Dirac semimetal (> 4 ML) has been reported. Helical spin texture induced by local Rashba effect has been reported in bulk PtTe2 crystal and expected in PtTe2 films. Such metallic films with local Rashba effect provide new opportunities for further investigating the intriguing properties. (2019-08-19)

Imaging of exotic quantum particles as building blocks for quantum computing
Researchers have imaged an exotic quantum particle -- called a Majorana fermion -- that can be used as a building block for future qubits and eventually the realization of quantum computers. (2019-07-29)

Improving the signal-to-noise ratio in quantum chromodynamics simulations
A study by Marco Ce, a physicist based at the Helmholtz-Institut Mainz in Germany, and recently published in EPJ Plus describes a new technique for simulating particle ensembles that are 'large' (at least by the standards of particle physics). The technique improves the signal-to-noise ratio and thus the precision of the simulation; crucially, it can also be used to model ensembles of baryons: a category of elementary particles that includes the protons and neutrons that make up atomic nuclei. (2019-07-18)

Weyl fermions discovered in another class of materials
A particular kind of elementary particle, the Weyl fermions, were first discovered a few years ago. Their specialty: they move through a material in a well ordered manner that practically never lets them collide with each other and is thus very energy efficient. For the very first time, scientists at the Paul Scherrer Institute PSI have experimentally proved their existence in another type of material: a paramagnet with intrinsic slow magnetic fluctuations. (2019-07-12)

New material shows high potential for quantum computing
A joint team of scientists at the University of California, Riverside, and the Massachusetts Institute of Technology is getting closer to confirming the existence of an exotic quantum particle called Majorana fermion, crucial for fault-tolerant quantum computing -- the kind of quantum computing that addresses errors during its operation. (2019-06-28)

Research reveals exotic quantum states in double-layer graphene
Researchers from Brown and Columbia Universities have demonstrated previously unknown states of matter that arise in double-layer stacks of graphene, a two-dimensional nanomaterial. These new states, known as the fractional quantum Hall effect, arise from the complex interactions of electrons both within and across graphene layers. 'The findings show that stacking 2D materials together in close proximity generates entirely new physics,' says Brown Professor Jia Li. (2019-06-25)

Ultra-cold lithium atoms shedding light on superfluid formation
A new study resolves a long-standing debate about what happens at the microscopic level when matter transitions into a superconducting or superfluid state. Correlations between pairs of atoms in an ultra-cold gas were found to grow suddenly as the system was cooled below the transition temperature. The experiments at Swinburne University of Technology used gases of lithium atoms cooled to temperatures below 100 nano-Kelvin (less than a millionth of a degree above Absolute Zero). (2019-05-28)

The discovery of acoustic spin
Recently, Chengzhi Shi (now at Georgia Tech), Rongkuo Zhao, Sui Yang, Yuan Wang, and Xiang Zhang from the University of California, Berkeley and Long Yang, Hong Chen, and Jie Ren from Tongji University discover and experimentally observe the existence of acoustic spin in airborne sound waves. (2019-05-28)

Artificial atomic scale materials: Discovering how electrons fatten!
A single and isolated electron has a clear electrical charge, magnetic moment and mass, and its free movement can be precisely predicted. Spanish scientists fabricated a nanoscale artificial material manipulating atoms one after the other and discovered that electrons around are very heavier. Heavy electrons are promising particles which endow of new functionalities to novel materials. (2019-05-23)

Computing faster with quasi-particles
In collaboration with researchers from Harvard University, researchers from the University of Würzburg have made an important step on the road to topological quantum computers. Now, they present their findings in the renowned scientific journal Nature. (2019-05-10)

New material also reveals new quasiparticles
Researchers at PSI have investigated a novel crystalline material that exhibits electronic properties that have never been seen before. It is a crystal of aluminum and platinum atoms arranged in a special way. This resulted in novel properties of electronic behaviour for the crystal as a whole, including so-called Rarita-Schwinger fermions in its interior. (2019-05-07)

Triplet superconductivity demonstrated under high pressure
Researchers in France and Japan have demonstrated a theoretical type of unconventional superconductivity in a uranium-based material, according to a study published in the journal Physical Review Letters. (2019-04-18)

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