Non-Abelian topology of nodal-line rings in <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mi mathvariant="script">PT</mml:mi></mml:math>-symmetric systems
Apoorv Tiwari, Tomáš Bzdušek
Abstract
Nodal lines inside the momentum space of three-dimensional crystalline solids are topologically stabilized by a flux of Berry phase. Nodal-line rings in PT -symmetric systems with negligible spin-orbit coupling (here described as "nodal class AI") can carry an additional "monopole charge," which further enhances their stability.
Topics & Concepts
Magnetic monopoleTopology (electrical circuits)Charge (physics)PhysicsAbelian groupGeometric phaseHomotopyMathematicsQuantum mechanicsPure mathematicsCombinatoricsTopological Materials and PhenomenaQuantum Mechanics and Non-Hermitian PhysicsMechanical and Optical Resonators