title: The A and B terms of magnetic circular dichroism revisited.
abstract: The temperature-independent part of the magnetic circular dichroism spectrum is conventionally divided into the Faraday A and B terms, where the A term is nonzero only for systems with degenerate states. We propose that this separation is abandoned in favor of a unified temperature-independent term. This proposal is based on complex polarization propagator calculations on three structurally similar porphyrins. These calculations also suggest that the Soret band of Zn-porphyrin is determined by an isolated degenerate 2E u state.
authors.forename: Harald
authors.initials: H
authors.lastname: Solheim
authors.forename: Kenneth
authors.initials: K
authors.lastname: Ruud
authors.forename: Sonia
authors.initials: S
authors.lastname: Coriani
authors.forename: Patrick
authors.initials: P
authors.lastname: Norman