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Search results for inversion symmetry

Nanophysics Nov 21, 2019

Breaking (and restoring) graphene's symmetry in a twistable electronics device

A recent study from the labs of James Hone (mechanical engineering) and Cory Dean (physics) demonstrates a new way to tune the properties of two-dimensional (2-D) materials simply by adjusting the twist angle between them. ...

General Âé¶¹ÒùÔºics Nov 6, 2019

Rotational form of spontaneous crystallographic ordering discovered in ferroic material

A team of researchers from the University of Michigan and Rutgers University has discovered a rotational form of spontaneous crystallographic ordering in a ferroic material. In their paper published in the journal Nature ...

Condensed Matter Nov 5, 2019

Chemists observe 'spooky' quantum tunneling

A molecule of ammonia, NH3, typically exists as an umbrella shape, with three hydrogen atoms fanned out in a nonplanar arrangement around a central nitrogen atom. This umbrella structure is very stable and would normally ...

Materials Science Oct 28, 2019

Soft double gyroids are unique, but imperfect, crystals

What appears to be an impossibly complicated maze is actually quite simple. Two complicated mazes, intertwined but not touching, tell a different story.

Quantum Âé¶¹ÒùÔºics Oct 3, 2019

Producing dissipative coupling in hybrid quantum systems

As quantum objects are susceptible to their surrounding environment, quantum coherence and quantum states can easily be destroyed due to the impact of external signals, which can include thermal noise and backscattered signals ...

General Âé¶¹ÒùÔºics Aug 7, 2019

Researchers uncover hidden topological insulator states in bismuth crystals

The search for better materials for computers and other electronic devices has focused on a group of materials known as "topological insulators" that have a special property of conducting electricity on the edge of their ...

Condensed Matter Apr 9, 2019

Evidence of pair-density wave (PDW) in spin-valley locked systems

The isolation of graphene more than a decade ago transformed the landscape of condensed-matter physics, as the single-atom-thick, two-dimensional material exhibited high crystal and electronic quality to represent a conceptually ...

General Âé¶¹ÒùÔºics Mar 22, 2019

How spin dances with dipole

The key physical property of multiferroic materials is the existence of a coupling between magnetism and polarization. The origin and manifestations of magnetoelectricity can be very different in the available multiferroic ...

General Âé¶¹ÒùÔºics Jan 14, 2019

5000 times faster than a computer—interatomic light rectifier generates directed electric currents

The absorption of light in semiconductor crystals without inversion symmetry can generate electric currents. Researchers at the Max Born Institute have now generated directed currents at terahertz (THz) frequencies, much ...

Optics & Photonics Nov 21, 2018

New device for symmetry-breaking-induced optical nonlinearity

Second-order nonlinear optical processes play a pivotal role in both classical and quantum applications, ranging from extension of the accessible frequencies to generation of quantum entangled photon pairs and squeezed states. ...

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