Author archives: DIPC

Nonlinear optics is concerned with the optical properties of matter subjected to intense electromagnetic fields. For nonlinearity to manifest itself, the external field should not be negligible compared to the internal fields of atoms and molecules of which the matter consists. Lasers are capable of generating external fields sufficiently intense for nonlinearity to occur. Actually […]

A catalyst is a substance that increases the rate of a chemical reaction without itself undergoing any permanent chemical change. The study of enzymes has provided us many of the prototypical concepts of catalysis, including the idea that a catalyst lowers the barrier to reaction and thereby accelerates the approach to chemical equilibrium, without altering […]

An exciton can be described as an electron-hole pair in a crystal that is bound in a manner analogous to the electron and proton in a hydrogen atom. The exciton behaves like an atomic excitation that passes from one atom to another. In most cases, excitons are induced by an electromagnetic wave, a photon. Interestingly […]

Yttrium barium copper oxide (YBCO) is a family of crystalline chemical compounds that display high-temperature superconductivity; it includes the first material ever discovered to become superconducting above the boiling point of liquid nitrogen (77 K) at about 93 K. This family is known as cuprates as it can be viewed as containing anionic copper complexes […]

One-dimensional metal−organic chains often possess a complex magnetic structure, susceptible to modification by alteration of their chemical composition. The possibility to tune their magnetic properties provides an interesting playground to explore quasi-particle interactions in low-dimensional systems. These systems have potential applications in the fabrication of nanodevices for spin sensing, spintronics, quantum computing based on the […]

Graphene is a key two-dimensional material that continues to reveal intriguing properties when stacked into just a few layers. But the interesting point is that it is not just a question of a layer sitting on another layer randomly, but how exactly their atoms are positioned in relation to each other. In this vein, for […]

A model of a physical system that can be solved exactly and the dynamics of which are characterized by regular rather than chaotic motion is called an integrable model. Integrable models can occur in Newtonian mechanics and quantum mechanics, with the harmonic oscillator being an example of such a model in both cases. Integrability has […]

When you collect vast amounts of data, most of them will likely be irrelevant or uninteresting. But, hidden in all that noise, you may find a jewel. The data where one scientific jewel, a supernova, has just been found is the collection of observations by the Hubble Frontier Fields (HFF) project. HFF drew on the […]

Nanothreads are one-dimensional covalently bonded materials, with all “backbone” bonds saturated in the organic sense, the first of which was made from polymerization of benzene in the solid state. Nanothreads are thicker than conventional hydrocarbon polymers such as polyethylene and thinner than traditional nanowires: as ladder polymers, they are examples of the thinnest possible rigid […]

Usually, optical activity is understood as the ability some substances have to change the handedness of polarized light when it goes through them. Molecules that show optical activity have no plane of symmetry. So-called chiral matter broadly describes structures for which left- or right-handed mirror images are non-superimposable, or, equivalently, that lack improper rotation axes […]