Emergent gauge fields in band insulators.

• Tác giả: Zhaoyu Han, Steven A Kivelson
• Ngôn ngữ: eng
• Ký hiệu phân loại: 668.14 Detergents and wetting agents
• Thông tin xuất bản: United States : Proceedings of the National Academy of Sciences of the United States of America , 2025
• Bộ sưu tập: NCBI
• ID: 743267
• Chủ đề: 1. Emergent; 2. Gauge; 3. Fields

Tóm tắt

By explicit microscopic construction involving a mapping to a quantum vertex model subject to the "ice rule," we show that an electronically "trivial" band insulator with suitable vibrational (phonon) degrees of freedom can host a "resonating valence-bond" state-a quantum phase with emergent gauge fields. This type of band insulator is identifiable by the existence of emergent gapless "photon" modes and deconfined excitations, the latter of which carry nonquantized mobile charges. We suggest that such phases may exist in the quantum regimes of various nearly ferroelectric materials.