Coulomb phase diagnostics as a function of temperature, interaction range, and disorder

Arnab Sen, R. Moessner, Shivaji Lal Sondhi

Research output: Contribution to journalArticle

21 Scopus citations

Abstract

The emergent gauge field characteristic of the Coulomb phase of spin ice betrays its existence via pinch points in the spin structure factor S in reciprocal space which takes the form of a transverse projector P at low temperature: S(q)∼P∼q⊥2/q2. We develop a theory which establishes the fate of the pinch points at low and high temperature, for hard and soft spins, for short- and long-ranged (dipolar) interactions, as well as in the presence of disorder. We find that their detailed shape can be used to read off the relative sizes of entropic and magnetic Coulomb interactions of monopoles in spin ice, and we resolve the question of why pinch points have been experimentally observed for Ho1.7Y0.3Ti2O 7 even at high temperature in the presence of strong disorder.

Original languageEnglish (US)
Article number107202
JournalPhysical review letters
Volume110
Issue number10
DOIs
StatePublished - Mar 5 2013

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

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