MRS Bulletin

Superconductivity at 100—Where we’ve been and Where we’re Going

Superconductivity at 100—Where we’ve been and Where we’re Going

Tuning the ground state of BaFe2As2: Phase diagrams and empirical trends

Ni Nia1 and Sergey L. Bud’koa2

a1 Department of Chemistry, Princeton University, Princeton, NJ 08544, USA; nni@princeton.edu

a2 Ames Laboratory Iowa State University, Ames, IA 50011, USA; e-mail budko@ameslab.gov

Abstract

We present a brief review of the phase diagrams of the transition metal, electron-doped BaFe2As2 systems and a comparison between them. This article also reviews the phase diagrams of hole- and isoelectronic-doped BaFe2As2, as well as BaFe2As2 under pressure. Empirical rules on the conditions necessary to induce superconductivity in this material are outlined. Evidence for multiple Lifshitz transitions in Co-doped BaFe2As2 and possible connections to superconductivity are also discussed.

Key Words:

  • Crystal;
  • compound;
  • superconducting;
  • electrical properties;
  • dopant
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