Category archives: Materials

Quantum dots embedded in graphene nanoribbons

Quantum dots embedded in graphene nanoribbons

ChemistryCondensed matterMaterialsNanotechnology

By DIPC

Graphene nanoribbons (GNRs), are strips of graphene with ultra-thin width (<50 nm). Graphene ribbons were introduced as a theoretical model by Mitsutaka Fujita and coauthors to examine the edge and nanoscale size effect in graphene. GNRs are very interesting structures, partly due to their attractive electronic properties. Those properties vary dramatically with changes in the […]

Quantifying the screening of electrons in graphene heterostructures

Quantifying the screening of electrons in graphene heterostructures

Condensed matterMaterialsPhysicsQuantum physics

By DIPC

Beginning in 1928, Felix Bloch, an assistant to Werner Heisenberg in Leipzig, began to make some realistic assumptions in an attempt to formulate a more complete quantum mechanics of electrical conductivity. First, because he wanted to assign a definite momentum and energy to each of the electrons, but not a definite position or a time […]

Manipulating the topological surface states with molecular adsorbates

Manipulating the topological surface states with molecular adsorbates

Condensed matterMaterials

By DIPC

A topological insulator is a material in which there is order associated to topology, i.e., the surface can conduct electricity but the bulk of the material is an insulator. In these last years topological insulators have received the attention of a large area of the scientific community thanks to their exotic properties. They are promising […]

Strains control electronic properties and magnetic ordering in an atomically-thin layer

Strains control electronic properties and magnetic ordering in an atomically-thin layer

Condensed matterMaterials

By DIPC

Geometrical structure, lattice periodicity and atomic arrangement are subtly intertwined with the electronic properties of materials. Sub-angstrom changes in the atomic distance are sufficient to modify the physical and chemical properties, such as the band-structure, carrier mobility and the chemical reactivity. The deposition of two-dimensional layered crystals on mechanically stretchable or bendable substrates can produce […]