Search results for dirac

Materials Science May 6, 2021

Unusual semimetal shows evidence of unique surface conduction states

Scientists at Tokyo Institute of Technology experimentally verify the existence of exotic surface conduction states in topological semimetals (TSMs), materials that lie at the boundary between conductors and insulators, by ...

Soft Matter Apr 29, 2021

Understanding the charge pumping and relaxation of the chiral anomaly in a Dirac semimetal

The 3D Dirac and Weyl semimetals can be characterized by a charge chirality with the parallel or antiparallel locking of electron spin in its momentum. Such materials can exhibit a chiral magnetic effect associated with the ...

Nanophysics Apr 27, 2021

Researchers discover two-dimensional material using high-pressure technology

An international team with researchers from the University of Bayreuth has succeeded for the first time in discovering a previously unknown two-dimensional material by using modern high-pressure technology. The new material, ...

Materials Science Apr 13, 2021

Giant electronic conductivity change driven by artificial switch of crystal dimensionality

The electronic properties of solid materials are highly dependent on crystal structures and their dimensionalities (i.e., whether the crystals have predominantly 2D or 3D structures). As Professor Takayoshi Katase of Tokyo ...

Optics & Photonics Apr 12, 2021

Topological insulator metamaterial with giant circular photogalvanic effect

Topological insulators have notable manifestations of electronic properties. The helicity-dependent photocurrents in such devices are underpinned by spin momentum-locking of surface Dirac electrons that are weak and easily ...

General Physics Mar 31, 2021

Super-precise Fermilab experiment carefully analyzing the muon's magnetic moment

Modern physics is full of the sort of twisty, puzzle-within-a-puzzle plots you'd find in a classic detective story: Both physicists and detectives must carefully separate important clues from unrelated information. Both physicists ...

General Physics Mar 24, 2021

Searching for hints of new physics in the subatomic world

Peer deeper into the heart of the atom than any microscope allows and scientists hypothesize that you will find a rich world of particles popping in and out of the vacuum, decaying into other particles, and adding to the ...

General Physics Mar 22, 2021

Scientists observe complex tunable magnetism tied to electrical conduction in a topological material

Scientists at the U.S. Department of Energy's Ames Laboratory have observed novel helical magnetic ordering in the topological compound EuIn2As2 which supports exotic electrical conduction tunable by a magnetic field. The ...

Superconductivity Mar 17, 2021

Magnetism meets topology on a superconductor's surface

Electrons in a solid occupy distinct energy bands separated by gaps. Energy band gaps are an electronic "no man's land," an energy range where no electrons are allowed. Now, scientists studying a compound containing iron, ...

Superconductivity Mar 10, 2021

Research predicts the high-temperature topological superconductivity of twisted double-layer copper oxides

Two-dimensional (2D) materials, such as graphene or transition metal dichalcogenides, can sometimes be assembled into bilayers with a twist between individual layers. In recent years, many researchers have been investigating ...

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