Antiferromagnetism and superconductivity in UPt3

Anupam Garg*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

The short-ranged antiferromagnetism recently seen in UPt3 is proved incompatible with two-dimensional (2D) order parameter models that take the antiferromagnetism as a symmetry-breaking field. To adjust to the local moment direction, the order parameter twists over very long length scales as per the Imry-Ma argument. A variational solution to the Ginzburg-Landau equations is used to study the nature of the short-range superconducting order. Although there are still two transitions, the lower one is of first order - in contradiction to experiments. It is shown that the latent heat predicted by the 2D models at the lower transition is too large no to have been seen. A simple periodic model is numerically studied to show that the second transition cannot be a crossover either.

Original languageEnglish (US)
Pages (from-to)4323-4334
Number of pages12
JournalJournal of Physics Condensed Matter
Volume10
Issue number19
DOIs
StatePublished - May 18 1998

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics

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