Round 6: Tossup 1

A quantity describing these entities scales with one over width for zigzag nanostructures and one over width squared for armchair nanostructures. The K-points of the Brillouin (“bree-WANN”) zones of TMDCs host the edges of these entities. These entities exhibit linearly dispersing Dirac spectra when their interfaces form non-smooth Dirac arcs, circles, nodes, or cones. In the tight-binding formalism, these structures are computed using a generalization of LCAO. These theoretical entities arise in the continuum limit of infinitely many adjacent atomic orbitals. The position of the Fermi level relative to these entities distinguishes conductors from insulators; for insulators, the energy gap between these entities is large. For 10 points, name these allowed energy levels of semiconductors that include their “conduction” and “valence” types. ■END■ (10[1])

Back to tossups

Buzzes

Summary