Sentences with word «semimetal»

When the two cones break the time reversal symmetry, they induce a Weyl semimetal state in which the electrons lose mass.

«The result is expected to improve fundamental understanding of fascinating properties of topological semimetals,» Mao said.

«We therefore dubbed this state a Weyl - Kondo semimetal.»

The Weyl semimetal state is induced when the opposing motions of the electrons cause the Dirac cones to split in two (illustrated on the left by outward facing electrons, opposite the inward facing electrons on the right).

Topological semimetals represent a new quantum state of matter.

Neutron scattering at the Department of Energy's (DOE's) Oak Ridge National Laboratory (ORNL) helped a multi-institutional team led by Tulane University investigate a graphene - like strontium - manganese - antimony material (Sr1 - yMn1 - zSb2) that hosts what researchers suspect is a Weyl semimetal phase.

Although graphite is known as one of the most chemically inert materials, we have found that graphene, a single atomic plane of graphite, can react with atomic hydrogen, which transforms this highly conductive zero - overlap semimetal into an insulator.

The recent prediction and experimental realization of standard type - I Weyl fermions in semimetals by two groups in Princeton and one group in IOP Beijing showed that the resistivity can actually decrease if the electric field is applied in the same direction as the magnetic field, an effect called negative longitudinal magnetoresistance.

Rice University physicists (from left) Hsin - Hua Lai, Qimiao Si and Sarah Grefe have made predictions that could help experimental physicists create the first «Weyl - Kondo semimetal.»

The researchers» discovery of a new magnetic topological semimetal is featured in the latest edition of the journal Nature Materials.

In Weyl semimetals, the electrons are more like charge carriers that behave as if they are nearly massless, which makes them highly mobile.

Researchers have since made monolayers of metals, semimetals, insulators and more, but magnetism was the final holdout.

That's why researchers are searching for Weyl semimetals, says Qiang Zhang, a visiting scientist from Louisiana State University (LSU) working in ORNL's Shull Wollan Center — a Joint Institute for Neutron Sciences.

«Weyl semimetals are rare, and most of them are nonmagnetic.

The properties of Weyl semimetals include both magnetism and topological semimetal behavior, in which electrons — or charge carriers — are nearly massless and immune to conduction defects.

«New type of quantum material: Predictions lay groundwork for experiments to create «Weyl - Kondo semimetal».»

Together with study co-author Silke Paschen, an experimental physicist at Vienna University of Technology who was spending six months at RCQM as a visiting professor when the discovery was made, Si, Lai and Grefe sought to identify the unique experimental signatures of the Weyl - Kondo semimetal.

«Neutrons reveal the wild Weyl world of semimetals.»

«Weyl semimetals are kind of the Holy Grail in physics right now,» said Alan Tennant, chief scientist at ORNL's Neutron Sciences Directorate.

Trace elements are increasingly widely used in the high - tech and medical sectors — for example, the transition metal tantalum and the semimetal germanium in electronic components, niobium and titanium in alloys and coatings, or gadolinium as a contrast medium and in luminous paints.

However, in some recently discovered materials, including «Dirac semimetals» — named for the physicist who wrote the equations to describe fast - moving electrons — nearly massless «quasiparticle» versions of electrons (and positively charged «holes») propagate through the crystal in this free manner.

However, as soon as we did the first ARPES measurements, it was clear that the material is a 3D Dirac semimetal.»

Up to now, this had been possible using the semimetal copper manganese arsenide CuMnAs only, a compound featuring several disadvantages concerning applications.

To avoid this effect, physicists in the working groups of Prof. Dr. Peter Hommelhoff and Prof. Dr. Heiko Weber used graphene — a semimetal consisting of only a single layer of carbon atoms.

The measurements also show that solid hydrogen under these conditions is on the borderline between a semiconductor, like silicon, and a semimetal, like graphite.

The new work shows that materials hosting a type - II Weyl fermion have mixed behavior: While for some directions of magnetic fields the resistivity increases just like in normal metals, for other directions of the fields, the resistivity can decrease like in the Weyl semimetals, offering possible technological applications.

There are many factors that influence, including the type of soil, since it can harbor heavy metals and semimetals that are carcinogenic for humans.

«The result is expected to improve fundamental understanding of fascinating properties of topological semimetals.»

The researchers» discovery of a new magnetic topological semimetal is featured in the latest edition of the prestigious journal Nature Materials.

According to a team of researchers at the Tata Institute of Fundamental Research (TIFR) in Mumbai, India, pure bismuth — a semimetal with a rhombohedral...

Professor Kim explained, «Graphene is a Dirac semimetal.

The main group elements include the active metals in the two columns on the extreme left of the periodic table and the metals, semimetals, and nonmetals in the six columns on the far right.