The single-point Berry phase in condensed-matter physics
Abstract
The Berry phase plays an outstanding role in condensed-matter physics, where it provides the main entry for defining and computing a key observable: macroscopic electrical polarization. This phase obtains as a loop integral in reciprocal space, which has the topology of a torus. I show here that in some circumstances the loop may be contracted to a point, and polarization can be computed in practice from a single Hamiltonian diagonalization.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Dec 08, 2022
- Source ID
- 10.1088/1751-8121/aca84b
Entities
People
- Raffaele Resta
Organizations
- Office of Naval Research