Search results for second-order topological modes

Superconductivity Jul 14, 2021

Higher-order topological superconductivity in monolayer iron-based superconductor

In particle physics, a Majorana fermion is charge neutral and its antiparticle is just itself. In condensed matter physics, a Majorana zero mode (MZM) is a quasi-particle excitation that appears in the surfaces or edges of ...

Superconductivity Jul 16, 2021

Unconventional superconductor acts the part of a promising quantum computing platform

Scientists on the hunt for an unconventional kind of superconductor have produced the most compelling evidence to date that they've found one. In a pair of papers, researchers at the University of Maryland's (UMD) Quantum ...

Quantum Physics Jun 21, 2021

PhD student obtains the Higgs mode via dimensional crossover in quantum magnets

In 2013, François Englert and Peter Higgs won the Nobel Prize in Physics for the theoretical discovery of a mechanism that contributes to our understanding of the origin of mass of subatomic particles, which was confirmed ...

General Physics 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 ...

Optics & Photonics Jul 21, 2020

Synthetic dimensions enable a new way to construct higher-order topological insulators

Topological insulators have been an exciting field of research with fundamental interest as well as practical applications such as robust transport of electrons and light, and topological quantum computing. The hallmark of ...

Optics & Photonics Jul 06, 2020

Low-threshold topological nanolasers based on the second-order corner state

The applications of topological photonics have been intensively investigated, including one-way waveguide and topological lasers. The topological lasers especially have attracted broad attention in recent years, which have ...

Quantum Physics Jan 16, 2018

Quan­tum physics turned into tan­gi­ble re­al­ity

ETH physicists have developed a silicon wafer that behaves like a topological insulator when stimulated using ultrasound. They have thereby succeeded in turning an abstract theoretical concept into a macroscopic product.

Optics & Photonics Aug 20, 2020

Trapping and controlling light at the interface of atomically thin nanomaterials

Light can partake in peculiar phenomena at the nanoscale. Exploring these phenomena can unlock sophisticated applications and provide useful insights into the interactions between light waves and other materials.

Optics & Photonics Aug 10, 2017

Two ways to improve optical sensing using different resonator techniques

(—Two independent teams working on research aimed at improving optical sensing have used techniques that involve coupling two or more modes of light such that their modes and their corresponding frequencies coalesce, ...

Optics & Photonics Jul 07, 2017

Helically twisted photonic crystal fibres

Photonic crystal fibres (PCF) are strands of glass, not much thicker than a human hair, with a lattice of hollow channels running along the fibre. If they are continuously twisted in their production, they resemble a multi-helix. ...

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