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Search results for quantum Hall

Materials Science Oct 8, 2019

Forward or backward? New pathways for protons in water or methanol

A collaborative ultrafast spectroscopy and ab initio molecular dynamics simulations study shows that proton vacancies in the form of hydroxide/methoxide ions are as relevant for proton transfer between acids and bases as ...

Superconductivity Oct 4, 2019

Research shows the 'magic range' of twisted bilayer graphene is larger than previously expected

In materials science and quantum physics, flat bands and correlated behaviors within the "magic angle" twisted bilayer graphene (tBLG) has sparked significant interest, although many of its properties face intense debate. ...

Quantum Âé¶¹ÒùÔºics Oct 3, 2019

2-D topological physics from shaking a 1-D wire

Limiting quantum particles to move in one, two, or three dimensions has led to the observation of many striking phenomena. A prime example is the quantization of the Hall conductance measured in 2-D materials in a strong ...

Optics & Photonics Oct 1, 2019

Beyond Einstein: Âé¶¹ÒùÔºicists solve mystery surrounding photon momentum

Albert Einstein received the Nobel Prize for explaining the photoelectric effect: in its most intuitive form, a single atom is irradiated with light. According to Einstein, light consists of particles (photons) that transfer ...

Quantum Âé¶¹ÒùÔºics Sep 30, 2019

Realizing a giant magnetic field by moiré pattern engineering

Scientists at the University of Hong Kong and Hunan Normal University showed that, in homobilayer transition metal dichalcogenides, the real-space Berry phase from moiré patterns manifests as a periodic magnetic field. The ...

Astronomy Sep 26, 2019

A different kind of gravitational wave detector

Hidden deep in a basement at Stanford stands a 10-meter-tall tube, wrapped in a metal cage and draped in wires. A barrier separates it from the main room, beyond which the cylinder spans three stories to an apparatus holding ...

Quantum Âé¶¹ÒùÔºics Sep 25, 2019

Log-periodic quantum oscillations and discrete scale invariance in Dirac materials

One fundamental problem of quantum electrodynamics is the fate of the superheavy atomic nucleus, which is proposed to collapse when the atomic number exceeds certain value. However, this intriguing supercritical collapse ...

Superconductivity Sep 24, 2019

Quantum Hall-based superconducting interference device

In a recent report published on Science Advances, Andrew Seredinski and co-workers presented a graphene-based Josephson junction with dedicated side gates fabricated from the same sheet of graphene as the junction itself. ...

General Âé¶¹ÒùÔºics Sep 20, 2019

The best of two worlds: Magnetism and Weyl semimetals

Imagine a world in which electricity could flow through the grid without any losses or where all the data in the world could be stored in the cloud without the need for power stations. This seems unimaginable but a path ...

General Âé¶¹ÒùÔºics Sep 19, 2019

Âé¶¹ÒùÔºicists discover topological behavior of electrons in 3-D magnetic material

An international team of researchers led by scientists at Princeton University has found that a magnetic material at room temperature enables electrons to behave counterintuitively, acting collectively rather than as individuals. ...

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