Berry phase in Magnetic Superconductors

Shuichi Murakami; Naoto Nagaosa

doi:10.1103/physrevlett.90.057002

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Berry phase in Magnetic Superconductors

Shuichi Murakami·Naoto Nagaosa

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Abstract

In magnetic systems, electronic bands often acquire nontrivial topological structure characterized by gauge flux distribution in momentum (k)-space. It sometimes follows that the phase of the wavefunctions cannot be defined uniquely over the whole Brillouin zone. In this Letter we develop a theory of superconductivity in the presence of this gauge flux both in two- and three-dimensional systems. It is found that the superconducting gap has "nodes" as a function of k where the Fermi surface is penetrated by a gauge string.

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Shuichi Murakami, Naoto Nagaosa. 2002-12-27. Berry phase in Magnetic Superconductors. https://doi.org/10.1103/physrevlett.90.057002

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