Femtosecond midÂ­IR laser pulses can be used to produce higherÂ­energy replicas of these structures in a FloquetÂ–Bloch ("floÂ­KAY blokh") state. A surfaceÂ­sensitive technique that can visualize several of these structures at once in momentumÂ­energy space is called angleÂ­resolved photoemission spectroscopy, or ARPES. When these things are concave downward, they are associated with a negative (*) effective mass. These things are usually visualized by plotting their dispersion relations within the first Brillouin ("breeÂ­wann") zone. They're not molecular orbitals, but tightÂ­binding models construct them from combinations of periodicallyÂ­arranged atomic orbitals. In semiconductors and insulators, the valence and conduction ones are separated by a gap. For 10 points, name these ranges of
Femtosecond midÂ­IR laser pulses can be used to produce higherÂ­energy replicas of these structures in a FloquetÂ–Bloch ("floÂ­KAY blokh") state. A surfaceÂ­sensitive technique that can visualize several of these structures at once in momentumÂ­energy space is called angleÂ­resolved photoemission spectroscopy, or ARPES. When these things are concave downward, they are associated with a negative (*) effective mass. These things are usually visualized by plotting their dispersion relations within the first Brillouin ("breeÂ­wann") zone. They're not molecular orbitals, but tightÂ­binding models construct them from combinations of periodicallyÂ­arranged atomic orbitals. In semiconductors and insulators, the valence and conduction ones are separated by a gap. For 10 points, name these ranges of energy which are filled by electrons in solids.
Femtosecond midÂ­IR laser pulses can be used to produce higherÂ­energy replicas of these structures in a FloquetÂ–Bloch ("floÂ­KAY blokh") state.
electronic  band [or energy  bands  ; do not accept "Fermi surface"]