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Search results for quantized conductance

Materials Science Jul 15, 2020

Higher-order topology found in 2-D crystal

Over the last decade, the field of condensed matter physics has experienced a golden age with the discovery of new materials and properties, and related technologies being developed at breakneck speed thanks to the arrival ...

Superconductivity Jul 3, 2020

Toward super-fast motion of vortices in superconductors

An international team of scientists from Austria, Germany, and Ukraine has found a new superconducting system in which magnetic flux quanta can move at velocities of 10 to 15 km/s. This opens access to investigations of the ...

General Âé¶¹ÒùÔºics Jun 16, 2020

A fractional corner anomaly reveals higher-order topology

Topological insulators (TIs) have an insulating interior and support conducting surface states with additional interfacing properties. The exotic metallic states on their surfaces can provide new routes to generate new phases ...

General Âé¶¹ÒùÔºics Jun 10, 2020

Signatures of fractional electronic charge observed in topological insulators

The charge of a single electron, e, is defined as the basic unit of electric charge. Because electrons—the subatomic particles that carry electricity—are elementary particles and cannot be split, fractions of electronic ...

Nanophysics May 25, 2020

Nanoscale optical pulse limiter facilitated by refractory metallic quantum wells

In the past several decades, physicists have conducted deep laboratory investigations into nonlinear optics, plasma physics and quantum science using advanced high-intensity, ultrashort-pulse lasers. Increased use of the ...

General Âé¶¹ÒùÔºics May 21, 2020

Searching for scalar dark matter using compact mechanical resonators

Researchers at University of Delaware, University of Arizona and Haverford College have recently introduced the idea of searching for scalar dark matter using compact acoustic resonators. Their paper, published in Âé¶¹ÒùÔºical ...

General Âé¶¹ÒùÔºics May 20, 2020

4-D electric circuit network with topology

In recent years, topology has emerged as an important tool to classify and characterize properties of materials. It has been found that many materials exhibit a number of unusual topological properties, which are unaffected ...

Nanophysics Feb 28, 2020

Helical quantum Hall phase in graphene on strontium titanate

Materials that exhibit topological phases can be classified by their dimensionality, symmetries and topological invariants to form conductive-edge states with peculiar transport and spin properties. For example, the quantum ...

Nanophysics Feb 19, 2020

A spin wave detective story: Researchers verify surprising behavior in a 2-D magnet

Researchers at the National Institute of Standards and Technology (NIST) have discovered a surprising feature in two-dimensional (2-D) magnets, a new class of materials receiving a great deal of attention. Their finding is ...

Quantum Âé¶¹ÒùÔºics 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 ...

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