The topological structure of the integral quantum Hall effect in magnetic semiconductor-superconductor hybrids

• 来源期刊: 中国物理B（英文版）
• 关键词: integral quantum Hall effect gauge potential Hopf index vortex
• 年，卷（期）: 2009,（6）
• 页码范围: 2535-2541
• 页数: 7页
• 语种: 英文

摘要

An unconventional integer quantum Hall regime was found in magnetic semiconductor-superconductor hybrids.By making use of the decomposition of the gauge potential on a U(1) principal fibre bundle over k-space, we study the topological structure of the integral Hall conductance. It is labeled by the Hopf index β and the Brouwer degree η. The Hall conductance topological current and its evolution is discussed.