Search results for dirac

General Physics 3 hours ago

A twist connecting magnetism and electronic-band topology

Materials that combine topological electronic properties and quantum magnetism are of high interest for the quantum many-body physics they exhibit and for possible applications in electronic components. ETH physicists have ...

Optics & Photonics Mar 20, 2020

Symmetry-enforced three-dimension Dirac phononic crystals

Dirac semimetals are critical states of topologically distinct phases. Such gapless topological states have been accomplished by a band-inversion mechanism, in which the Dirac points can be annihilated pairwise by perturbations ...

General Physics Feb 03, 2020

Exotic new topological state discovered in Dirac semimetals

Fundamental research in condensed matter physics has driven tremendous advances in modern electronic capabilities. Transistors, optical fiber, LEDs, magnetic storage media, plasma displays, semi-conductors, superconductors—the ...

Quantum Physics Feb 13, 2020

Quantum anomalous Hall effect in intrinsic magnetic topological insulator

Nontrivial band topology can combine with magnetic order in a magnetic topological insulator to produce exotic states of matter such as quantum anomalous Hall (QAH) insulators and axion insulators. An aim of condensed matter ...

Condensed Matter Jan 14, 2020

New classes of topological crystalline insulators having surface rotation anomaly

In a new report on Science Advances, Chen Fang and Liang Fu from the Beijing National Laboratory for Condensed Matter Physics in China, Kavli Institute for Theoretical Sciences and the Department of Physics, Massachusetts ...

Nanophysics Feb 11, 2020

Misalignments in encapsulated graphene lead to strong modification of electronic properties

Researchers at the University of Antwerp report how higher-order periodic modulations called supermoiré caused by the encapsulation of graphene between hexagonal boron nitride affect the electronic and structural properties ...

General Physics Jan 31, 2020

Calculating Hawking radiation at the event horizon of a black hole

A RUDN University physicist has developed a formula for calculating Hawking radiation on the event horizon of a black hole, which allows physicists to determine how this radiation would be changed with quantum corrections ...

Superconductivity Feb 25, 2020

CaPtAs: A new noncentrosymmetric superconductor

A research group from Zhejiang University in China has found that the noncentrosymmetric compound CaPtAs is a superconductor, which shows evidence of unconventional properties. This compound provides a new opportunity for ...

General Physics Feb 18, 2020

MoEDAL hunts for dyons

A magnetic monopole is a theoretical particle with a magnetic charge. Give it an electric charge, and you get another theoretical beast, dubbed a dyon. Many "grand unified theories" of particle physics, which connect fundamental ...

General Physics Feb 03, 2020

Heisenberg limit gets a meaningful update

One of the cornerstones of quantum theory is a fundamental limit to the precision with which we can know certain pairs of physical quantities, such as position and momentum. For quantum theoretical treatments, this uncertainty ...

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