Two-dimensional hole gas in a one-dimensional superlattice
Kvon Z. D., Kol'tsov B. B., Neizvestnyi I. G., Ovsyuk V. N.
A minigap has been detected in the energy spectrum of two-dimensional holes in inversion channels on high-index silicon surfaces. This discovery furnishes the first direct experimental evidence for the existence of a one-dimensional superlattice on such surfaces.