Physical realization of the parity anomaly in condensed matter physics

Eduardo H Fradkin, Elbio Dagotto, Daniel Boyanovsky

Research output: Contribution to journalArticlepeer-review


We show that a PbTe-type narrow-gap semiconductor with an antiphase boundary (or domain wall) has currents of abnormal parity and induced fractional charges. A model is introduced which reduces the problem to the physics of a Dirac equation with a soliton in background electric and magnetic fields. We show that this system is a physical realization of the parity anomaly.

Original languageEnglish (US)
Pages (from-to)2967-2970
Number of pages4
JournalPhysical review letters
Issue number23
StatePublished - 1986

ASJC Scopus subject areas

  • General Physics and Astronomy


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