Category archives: DIPC

Investigating the fundamental stages of the CO oxidation reaction using a kinked Pt crystal

Investigating the fundamental stages of the CO oxidation reaction using a kinked Pt crystal

CatalysisChemistryDIPC Interfaces

By DIPC

Carbon monoxide (CO) oxidation (2CO + O2 → CO2) on platinum (Pt) group metal surfaces is the model heterogeneous gas/surface catalytic reaction. Pt itself is of the upmost importance as a catalyst for car exhaust cleaning or for the water gas shift reaction, whereas Pt crystal surfaces are model systems for investigating the catalytic CO […]

Synthesis of organometallic helicenes by simple combinations

Synthesis of organometallic helicenes by simple combinations

ChemistryDIPC BiochemistryMaterials

By DIPC

“Helicene” is the name introduced by Newman in 1955, to describe the benzologues of phenanthrene in which the extra ortho -condensed rings give rise to a (regular) cylindrical helix. The pioneer work of Newman in this field cannot be overemphasized; his brillant synthesis and resolution of [6]helicene will remain as a landmark, for it opened […]

An odd nonlinear conductivity in chiral tellurium

An odd nonlinear conductivity in chiral tellurium

DIPC Advanced materialsDIPC Interfaces

By DIPC

Electrical transport in non-centrosymmetric materials departs from the well-established phenomenological Ohm’s law. Instead of a linear relation between current and electric field, a non-linear conductivity emerges along specific crystallographic directions. This non-linear transport is fundamentally related to the lack of spatial inversion symmetry. Ohm’s law is one of the most established relations in Physics and […]

A Topological Phonon Database has been built

A Topological Phonon Database has been built

Condensed matterDIPC Advanced materialsQuantum physics

By DIPC

The discovery of materials with topologically nontrivial electronic bands has led to high-throughput computational efforts that uncovered such bands in most known inorganic crystalline materials. Thus, in 2017, a team of researchers presented what they called Topological Quantum Chemistry (TQC), a new and complete understanding of the structure of bands in a material that links […]

How to calculate entanglement entropy using a Monte Carlo method

How to calculate entanglement entropy using a Monte Carlo method

DIPC Quantum Systems

By DIPC

Entanglement entropy is a measure of the degree of quantum entanglement between two subsystems constituting a two-part composite quantum system. But entanglement entropy also quantifies the information shared between a subsystem and its environment in a quantum many-body wavefunction. Interestingly, the finite-size scaling form of entanglement entropy has contributions that depend uniquely on universal physical […]

Vortices and skyrmions in water surfaces

Vortices and skyrmions in water surfaces

DIPC Quantum SystemsPhysics

By DIPC

Numerous physical systems—from classical electromagnetic fields to quantum particle fields—exhibit oscillating wave behavior. Specific settings exist, both in nature and in artificial systems, where these waves form patterns with holes, loops, and other distinct topological characteristics, often referred to as topological wave structures. Now, a team of researchers describes how these structures, which have previously […]

A boson travelling slower than escape velocities of stars and galaxies

A boson travelling slower than escape velocities of stars and galaxies

AstrophysicsCosmologyDIPC Particle Physics

By DIPC

The emergence of detector technologies with sensitivity to lower energies and improved resolution invites a shift of emphasis in particle-decay searches for massive neutral bosons: the kinematic limit of these reactions remains an unexplored realm where cosmologically-relevant particles may be waiting to be discovered. A case that illustrate this is the charged lepton flavour violating […]

Heavy fermions in a 2D van der Waals metal

Heavy fermions in a 2D van der Waals metal

DIPC Advanced materialsDIPC Electronic Properties

By DIPC

A team of researchers has successfully synthesized the first 2D heavy fermion material. The new material is a layered intermetallic crystal composed of cerium, silicon, and iodine (CeSiI) . Heavy fermion compounds are a class of materials with electrons that are up to 1000x heavier than usual. In these materials, electrons get tangled up with […]

Contradictions in (Cs,K,Rb)V<sub>3</sub>Sb<sub>5</sub> are a feature, not a bug

Contradictions in (Cs,K,Rb)V3Sb5 are a feature, not a bug

Condensed matterDIPC Advanced materials

By DIPC

Spontaneously broken symmetries are at the heart of many phenomena of quantum matter and physics more generally. However, determining the exact symmetries that are broken can be challenging due to imperfections such as strain, in particular when multiple electronic orders are competing. This is exemplified by charge order in some kagome systems, where evidence of […]