Details

Autor(en) / Beteiligte

• Yang, Yan-Bin
• Qin, Tao
• Deng, Dong-Ling
• Duan, L-M
• Xu, Yong

Titel

Topological Amorphous Metals

Ist Teil von

• Physical review letters, 2019-08, Vol.123 (7), p.076401-076401, Article 076401

Ort / Verlag

United States: American Physical Society

Erscheinungsjahr

2019

Link zum Volltext

Quelle

PROLA

Beschreibungen/Notizen

• We study amorphous systems with completely random sites and find that, through constructing and exploring a concrete model Hamiltonian, such a system can host an exotic phase of topological amorphous metal in three dimensions. In contrast to the traditional Weyl semimetals, topological amorphous metals break translational symmetry, and thus they cannot be characterized by the first Chern number defined based on the momentum space band structures. Instead, their topological properties will manifest in the Bott index and the Hall conductivity as well as the surface states. By studying the energy band and quantum transport properties, we find that topological amorphous metals exhibit a diffusive metal behavior. We further introduce a practical experimental proposal with electric circuits where the predicted phenomena can be observed using state-of-the-art technologies. Our results open the door to exploring topological gapless phenomena in amorphous systems.