Continuous Transition between Antiferromagnetic Insulator and Paramagnetic Metal in the Pyrochlore Iridate Eu2Ir2O7

Jun J. Ishikawa; Eoin C. T. O'Farrell; Satoru Nakatsuji

doi:10.1103/PhysRevB.85.245109

Continuous Transition between Antiferromagnetic Insulator and Paramagnetic Metal in the Pyrochlore Iridate Eu2Ir2O7

Strongly Correlated Electrons 2015-06-04 v1

Authors: Jun J. Ishikawa , Eoin C. T. O'Farrell , Satoru Nakatsuji

View on arXiv ↗ PDF ↗ DOI ↗

Abstract

Our single crystal study of the magneto-thermal and transport properties of the pyrochlore iridate Eu2Ir2O7 reveals a continuous phase transition from a paramagnetic metal to an antiferromagnetic insulator for a sample with stoichiometry within ~1% resolution. The insulating phase has strong proximity to an antiferromagnetic semimetal, which is stabilized by several % level of the off-stoichiometry. Our observations suggest that in addition to electronic correlation and spin-orbit coupling the magnetic order is essential for opening the charge gap.

Keywords

metal-insulator transition magnetic phase transitions perovskite magnetism

Cite

@article{arxiv.1203.4182,
  title  = {Continuous Transition between Antiferromagnetic Insulator and Paramagnetic Metal in the Pyrochlore Iridate Eu2Ir2O7},
  author = {Jun J. Ishikawa and Eoin C. T. O'Farrell and Satoru Nakatsuji},
  journal= {arXiv preprint arXiv:1203.4182},
  year   = {2015}
}

Comments

6 pages, 6 figures

Related papers

View all related →

Materials Science · Physics

Magnetic field-induced insulator-semimetal transition in a pyrochlore Nd2Ir2O7