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 […]
The urban heat island effect has become a critical issue in urban areas, intensifying heat-related problems and increasing energy consumption. Urban areas tend to experience higher temperatures compared to those of surrounding rural areas, this is known as the urban heat island effect. The elevated temperature in cities is primarily attributed to the high density […]
Condensed matter • DIPC Advanced materials • Quantum physics
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 […]
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 […]
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 […]
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 […]
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 […]
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 […]
Whenever an electric current flows a magnetic field is produced; as the orbital motion and the spin of atomic electrons are equivalent to tiny current loops, individual atoms create magnetic fields around them, when their orbital electrons have a net magnetic moment as a result of their angular momentum. The magnetic moment of an atom […]
Twisted bilayer and multilayer systems represent two-dimensional materials, where atom-thick layers of the same or different materials are superimposed and rotated by an arbitrary twist angle. Twisted bilayer graphene (TBG) represents arguably the most prominent physical system of this kind, the bilayers of transition metal dichalcogenides (TMD) the other. The effect of twisting two periodic […]