Collapse of Integer Hall Gaps in a Two-Dimensional Hole System

Szu-Cheng Cheng

Chinese Journal of Physics

36卷2S期（1998 / 04 / 01）

222 - 224

英文

In the integral quantum Hall regime, Wigner crystallization due to the Landau-level mixing is investigated in a two-dimensional hole system. By calculations of excitation energies, we show that Landau-level mixing effects can destroy the energy gap, which leads to an integral quantum Hall effect, at finite wave vector. Such a destruction of the energy gap at finite wave vector is interpreted as Wigner crystallization in a two-dimensional hole system.